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#290445 - 2020-01-13 23:10 568.2mm No Sound on Select DSP Presets After Firmware Downgrade
Registered: 2019-12-11
Posts: 25
SixSpeed Offline
Harmless
SixSpeed Offline
Harmless

Registered: 2019-12-11
Posts: 25
Loc: New Jersey, USA
Hi Gents,

Thanks for all your help in getting me the 2.12 firmware on my 568.2mm.

So the issue I am having is no matter how many times I have downgraded the firmware via the WinFup application or manually one by one in the Legacy Configuration program the result is the same.

All of the DSP modes I enjoyed on the pre v2.5 have returned and my config is restored but NONE of the DSP modes that were axed after the 2.5 update produce any sound despite all of them being available again on the screen.

My unit is verified in the Display successfully showing v2.12/2.38m which was previously the 2.5b9/2.62m.

I only get sound on the DSP modes that were kept after the 2.5 update for my configuration which are Music, Stereo, Direct, Trifield and Discrete/Cinema on the MHR Lossless 6CH LPCM input from my Pioneer universal player.

As a test I restored the 2.5b9 firmware with my 2.5b9 config settings and the unit works correctly with all the 2.5+ version DSP modes (much less options on my config and not desirable).

When I upload my configuration after the firmware restore or downgrade they are 100% verified the correct format, 2.5 format config for the 2.5b9 firmware and the 2.0-2.49 config when I have 2.12 loaded on the unit.

I have been stumped on this all day and for the life of me cannot figure out why the unit won't produce sound on those DSP modes if they show up on the display and the unit shows it received the 2.12 firmware correctly.

I am using the latest version of the Legacy Config Manager I believe 2.21R and the latest version of WinFUP 3.7 or so. Lastly, I have tried downloading legacy WinFup software from the wayback links but none of them work correctly and fail during firmware upload or have issues maintaining an uplink of the firmware. Only the latest WinFup or the Legacy config program can upload the firmware.

The only thing I can think of is that I most likely need a different version of the legacy config program OR a different version of the WinFup program. Is that correct?

Other than that I am totally stumped as to why the unit won't produce sound on the 2.0-2.49 specific DSP modes like legacy ProLogic, Super Stereo, Mono etc.

Your guys help with this is immensely appreciated as always.

Six


Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
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#290447 - 2020-01-13 23:46 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2005-05-11
Posts: 104
swpnt Online content
Hitchhiker
swpnt Online content
Hitchhiker

Registered: 2005-05-11
Posts: 104
Loc: Woking, Surrey, UK
Have you tried re-typing the unit?

I think you'll find a reset should remove the redundant DSP modes as these were only available in the 2.59b firmware.

To re-type, put the unit in standby and press the Volume up for 3 seconds.

Let us know if that resolves the problem.

Cheers,

Steve


Main: 861v4 (LPS), 808.3, HD621, DSP6k, DSP5200HC, DSP33, SW1600, MC200,Sky HD, Cambridge Audio BD, C10
Office: 818v3, 800v4, 557, MF MC2s, Mac Mini
Office2: 561, M3, M2500
Spare: 100 Series,200 Series,500 Series, M60, M60C, DSP5k(s), DSP5kC, C15
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#290448 - 2020-01-13 23:52 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2002-08-28
Posts: 4,580
Mr Meridian Offline
President of the Imperial Galactic Government
Mr Meridian Offline
President of the Imperial Galactic Government

Registered: 2002-08-28
Posts: 4,580
Loc: Perthshire, Scotland
Hi Six

You mentioned that the issue seems to be with the MCH input?

Can you successfully access these older DSP modes when using any of the regular 2 channel SPDIF inputs?

It's a known feature of the processors that anything coming in on the 6 channel input (either mm on your 568, or the 3xSPDIF arrangement in an 861v4) has a different set of DSP presets to signals coming in on the SPDIF inputs. Even if you are only sending in a stereo signal, if it's via the mm module, you'll get the presets you are seeing.

On the broader issue, the individual files that comprise a firmware update had their suffix changed after the embargo. I think they were .mfu and became .mf(something else) Make sure you have the correct versions. I think you have already spotted that the 2.12 firmware needs an older version of both the config programme, and the Winfup loader, the 2.5b requires a newer version of both. Both varieties require different config files, created with the relevant Config programme.

There were tech notes available at the time which explained the changes to the DSP presets and how the unit handled them, you'll find it in either the Wiki or Duncan's Info site (links at the top of every page here)

If you have sources which are two channel (which I guess is most of your original Pro Logic content?) I'd recommend feeding those into the 568.2mm by either SPDIF, optical or analogue as appropriate for the device.

Cheers

George

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#290450 - 2020-01-14 00:53 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: Mr Meridian]
Registered: 2019-12-11
Posts: 25
SixSpeed Offline
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SixSpeed Offline
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Registered: 2019-12-11
Posts: 25
Loc: New Jersey, USA
Thanks for the prompt reply guys!

So the multichannel input works perfectly on the downgrade to 2.12. No issues there, the Discrete/Cinema modes do their job.

The issue is for my Optical input which is my primary input that the 2ch DSP modes that were removed after 2.5 that are then restored when I downgrade to 2.12 I simply don't get any sound on those DSP presets. The only sound I get is on DSP presets that were common to 2.5 and 2.12 such as Music, Trifield, Stereo and Direct and the Discrete/Cinema modes on the MHR input.

Original ProLogic, Original TV Logic, Super Stereo, Ambisonic, MuLogic and the older "PL2" named PL2 presets have no sound whatsoever.

I downgrade the unit, and then upload my configuration file which is correctly formatted for 2.0-2.49 firmware. I have tried running an older version of the Flash Program, Version 3.0.0.861 for firmware to see if it makes a difference and no dice.

On the other hand, if I restore the unit to 2.5b9 and upload my 2.5 specific config file that works fine for all the 2.5+ DSP modes but I lose all the pre 2.5 modes I wanted back on the unit for my needs specifically Original ProLogic and Super Stereo, MuLogic and others. After 2.5+ update, Meridian disabled the Super Stereo preset for 3/1 surround speaker configurations, it used to work for that config on pre 2.5 568.2's and the 565.

I haven't tried manually retyping as suggested as the manual config is atrocious on the 568 which is why on the 568 I have always used the computer link. On the 565 the setup was much more intuitive via manual and had more provisions for my specific speaker setup. But I'll go ahead and try doing the manual typing as a temp stop gap as suggested to see if that will "reset" the unit.

Fingers crossed that will work and restore audio to the pre 2.5 DSP presets on via 2ch PCM Optical input from my TV. And then I'll be able to restore the correct config with the computer.

Six


Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
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#290451 - 2020-01-14 04:39 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2019-12-11
Posts: 25
SixSpeed Offline
Harmless
SixSpeed Offline
Harmless

Registered: 2019-12-11
Posts: 25
Loc: New Jersey, USA
Sadly the temp typing in of a new preset did not change anything.

I've restored the unit back to 2.5b9 with C044 mfu which has a working Trifield width for now. Truthfully the optical input 16/48khz SPDIF sounds better on 2.12 than it does on 2.5b9 but not by much.

Just really missing all those DSP modes I've lost on 2.5b9. There has to be some way I can get this unit restored back to 2.12/238m in full working order with all DSP modes producing sound again.

I wish there was a factory reset on this thing to restore it to Firmware 2.0/227m so see if that version would work.

The 568.2 is a glorious sounding unit, just want my old DSP modes back! Pretty frustrating... frown


Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
Edited by SixSpeed; 2020-01-14 04:39.
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#290453 - 2020-01-14 06:12 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2004-08-07
Posts: 7,866
Ian Offline
President of the Imperial Galactic Government
Ian Offline
President of the Imperial Galactic Government

Registered: 2004-08-07
Posts: 7,866
Loc: Surrey, England, UK
If you have not studied these. They contain a number of really important bits of info as it was not a straight forward upgrade - there were a number of conversions applied in various places.

568v2.5 upgrade

A fundamental change in philosophy that remains to this day.
v4 presets usage

I would concentrate on making sure the firmware is loaded exactly as stated (no mix and match) and retyping correctly (thats your factory reset - I wish Meridian called it that). Then when that is all working, move on from there.

Yes. v2.5 will sound very different - more like the G series than pre 2.5 568's. Thats down to personal taste.

Also, I have a nagging feeling that 2.5 was a one way update. Long time ago since I considered doing mine, but it was back in the days when Meridian were very good at hand holding us. There was something they said about that upgrade that put me off doing it rather than risk trying then reverting.







Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 Nuc), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).
Edited by Ian; 2020-01-14 06:49.
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#290454 - 2020-01-14 06:38 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: Ian]
Registered: 2004-04-15
Posts: 12,640
VirusKiller Offline
Don't Panic
VirusKiller Offline
Don't Panic

Registered: 2004-04-15
Posts: 12,640
Loc: nr. Milton Keynes, UK
Originally Posted By Ian
Also, I have a nagging feeling that 2.5 was a one way update
I’m not sure about this. One way update is definitely true for the last 598 firmware, but that’s the only one that comes to mind.


Roon Developer and ex-moderator of this Forum
I am #25 in the HH1 photo of fame.
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#290468 - 2020-01-14 14:21 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: VirusKiller]
Registered: 2019-12-11
Posts: 25
SixSpeed Offline
Harmless
SixSpeed Offline
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Registered: 2019-12-11
Posts: 25
Loc: New Jersey, USA
Ian and Virus Killer,

Thanks so much for the help. I too fear this 568.2 is "stuck" on the Beta and is not reversible, at least not without sending it in to someone to fix this.

I have read all the PDFs regarding the 2.5 changes and I understand it basically aligns the 568.2 to how the G Series and 861V4+ Units handle DSP.

The main reason I went with a Meridian 500 series processor is they have insane customization and are virtually the only digital modern processors around that properly support a 3/1 (LCRS) speaker arrangement, and on the fly fold down Stereo surrounds in 5.1 to a mono center rear signal with perfection. The 2.5+ changes really alienate someone with my config and the DSP modes and unit are really meant for 2 and 4 speaker surround setups. Gone are all the LCRS friendly modes like Super Stereo, Original ProLogic (Dolby Cat. 150) and other modes.

Yes, I agree, I greatly preferred the sound of pre 2.5 in addition to having tons more DSP presets I have mentioned that IMHO Meridian foolishly removed. I bought this 2.5b9 568.2 with the assumption I could easily flash it down to 2.12/238m and be done with it.

I am not pleased with the 2.5+ changes hence why I badly want to restore the unit to (IMO) its full pre beta function and DSP capability and sound signature.

Will give retyping on the unit manually another chance once reflashed back to 2.12/238m even though I am certain it still won't produce sound on the pre 2.5 DSP modes still. Something on this unit is "stuck" and refuses to get out of a 2.5 DSP state even though the unit says it's 2.12 on the screen, shows all the pre-beta DSP modes restored that I want back. They just don't produce any sound sadly.

Gonna try flashing it from a different computer and if that does not work I will be sending this unit in to repair place that can get this thing permanently back on 2.12 without any BS and fully working.

I get the feeling EPROM memory is leaving the 2.5+ DSPC and DSPD programs cached somewhere on the chip even though the flash utility verifies it's back on 2.12 and all the DSP modes returning as options confirm this, but something deep in there is not allowing it to work as it should.


Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
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#290482 - 2020-01-15 11:12 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: VirusKiller]
Registered: 2019-12-11
Posts: 25
SixSpeed Offline
Harmless
SixSpeed Offline
Harmless

Registered: 2019-12-11
Posts: 25
Loc: New Jersey, USA
Originally Posted By VirusKiller
Originally Posted By Ian
Also, I have a nagging feeling that 2.5 was a one way update
I’m not sure about this. One way update is definitely true for the last 598 firmware, but that’s the only one that comes to mind.


I'm now completely convinced Ian is right. It's now been 3 days and yesterday I spent 4 hours trying to get the system flashed back to 2.0/227m firmware which was on the Floppy Disk that came with the 568.2mm, the original 568.2 firmware.

Same problem, the unit "successfully" downgrades yet produces zero sound on 70% of the DSP settings. Another quick check I figured out is running the Calibration speaker pink noise, when I flash down to 2.12 or 2.0, if it generates no sound in calibration those DSP modes do not work. If I flash back to 2.5b9 then the Calibration generates noise as normal and all 2.5+ DSP modes work.

FWIW even using the legacy WinFUP versions, or even the old school .BAT command prompt triggered script on the 2.0 floppy doesn't make any difference, it will only make sound once I'm back on 2.5b9.

Re-typing on the unit to a basic default setting makes zero difference after flashing.

I can't understand for the life of me why Meridian would make this Beta firmware a one-way ticket, that's really lousy of them.

Maybe there is one last very specific thing I need to do I am missing but I very much doubt it, I have tried literally every possible thing.

At this point it sounds like I will have to send this thing in to a repair shop or someone that can manually repair and restore this 568.2 back to a non-beta firmware by opening it up.

Does anyone know where in the United States I can send this damn 568 for someone to fix this thing for me? I doubt Meridian will perform this job for me regardless the cost.

The unit is literally in Mint condition, just is only operational on this 861v4/G68 style beta firmware.

Six


Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
Edited by SixSpeed; 2020-01-15 11:13.
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#290483 - 2020-01-15 11:22 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2002-08-28
Posts: 4,580
Mr Meridian Offline
President of the Imperial Galactic Government
Mr Meridian Offline
President of the Imperial Galactic Government

Registered: 2002-08-28
Posts: 4,580
Loc: Perthshire, Scotland
Contact Marc Koval of this parish, he's the former Meridian Service engineer for the US and set up independently a few years ago.

I wouldn't trust any non Meridian service person to tinker with the unit, this is a very specific issue.

Cheers

George

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#290484 - 2020-01-15 11:35 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: Mr Meridian]
Registered: 2019-12-11
Posts: 25
SixSpeed Offline
Harmless
SixSpeed Offline
Harmless

Registered: 2019-12-11
Posts: 25
Loc: New Jersey, USA
Originally Posted By Mr Meridian
Contact Marc Koval of this parish, he's the former Meridian Service engineer for the US and set up independently a few years ago.

I wouldn't trust any non Meridian service person to tinker with the unit, this is a very specific issue.

Cheers

George


Thanks so much for the advice George.

I'll get on that ASAP. Is he the gentlemen that runs "The Repair Shop" website in the US, or is he only on here?

Just want to confirm.

Six


Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
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#290485 - 2020-01-15 11:37 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2005-05-11
Posts: 104
swpnt Online content
Hitchhiker
swpnt Online content
Hitchhiker

Registered: 2005-05-11
Posts: 104
Loc: Woking, Surrey, UK
When you re-flash the 568 with the 2.12 firmware, do you also re-load the TYPES568.MFU file?

I don't think this file is loaded automatically but should restore the types following a firmware change.

It may be worth trying before having to send the unit off for repair.

Let us know how you get on.

Cheers,

Steve


Main: 861v4 (LPS), 808.3, HD621, DSP6k, DSP5200HC, DSP33, SW1600, MC200,Sky HD, Cambridge Audio BD, C10
Office: 818v3, 800v4, 557, MF MC2s, Mac Mini
Office2: 561, M3, M2500
Spare: 100 Series,200 Series,500 Series, M60, M60C, DSP5k(s), DSP5kC, C15
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#290490 - 2020-01-15 15:04 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: swpnt]
Registered: 2019-12-11
Posts: 25
SixSpeed Offline
Harmless
SixSpeed Offline
Harmless

Registered: 2019-12-11
Posts: 25
Loc: New Jersey, USA
Originally Posted By swpnt
When you re-flash the 568 with the 2.12 firmware, do you also re-load the TYPES568.MFU file?

I don't think this file is loaded automatically but should restore the types following a firmware change.

It may be worth trying before having to send the unit off for repair.

Let us know how you get on.

Cheers,

Steve


Hi Steve,

Thanks for reaching out.

Yes after flashing via the .MFP I then manually flash the TYPES568.MFU file and unfortunately it does not make any difference frown

After uploading that file I do a manual reset re-typing (as suggested here) a stock setting, no sound or then uploading my config same thing, no sound.

There has to be something else maybe that needs to be done when doing the downgrade from the Beta 2.5b9/262m to the latest official 2.12/238m or initial 2.0/227m.

I have also tried doing the firmware downgrade manually one by one via the Legacy Configuration Program's internal firmware uploader but it makes no difference. As well as the legacy Floppy Disk's .BAT and Command Prompt flash loading for the 2.0 version. Same thing, successful reflash with no sound.

Another thing I tried was renaming the file names of the 2.12 and 2.0 firmware files once back on 2.5b9 to do the downgrade again to the same name of those in the 2.5B9 firmware with the hope it will overwrite and remove any files from 2.5 that could be left over in the event the 568 is not properly erasing them.

I think the issue lies with the 2.0 and 2.12 DSPC and DSPD files refusing to correctly work with the audio circuitry despite the programs saying they are successfully flashed and all data has been transferred. There are no errors like "BAD EPROM" or "BAD SOFTWARE" display at all. The restoration of the pre 2.5 DSP modes show they are back but they don't make any sound. So I'm thinking there might be a very specific procedure Meridian has not mentioned to restore the 568.2mm from a 861/G68 based DSP to back to its original 500 series DSP configuration.

Or maybe there is special file or command that needs to be done to downgrade a 568.2 that has the 861/G68 format Beta Firmware/DSP back to 2.12 or 2.0. Perhaps like a specific tool/command or procedure to comprehensively clear and erase the EPROM and Chipsets to allow new system files to go into a clean state.



Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
Edited by SixSpeed; 2020-01-15 15:04.
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#290493 - 2020-01-15 16:02 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2005-05-11
Posts: 104
swpnt Online content
Hitchhiker
swpnt Online content
Hitchhiker

Registered: 2005-05-11
Posts: 104
Loc: Woking, Surrey, UK
If I get a moment, I'll give it a try on my 568.2mm. It is currently running 2.59b and I have 2.12, so I will see if it experiences similar issues with multi-channel presets.

I'll report back and let you know.

Cheers,

Steve


Main: 861v4 (LPS), 808.3, HD621, DSP6k, DSP5200HC, DSP33, SW1600, MC200,Sky HD, Cambridge Audio BD, C10
Office: 818v3, 800v4, 557, MF MC2s, Mac Mini
Office2: 561, M3, M2500
Spare: 100 Series,200 Series,500 Series, M60, M60C, DSP5k(s), DSP5kC, C15
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#290494 - 2020-01-15 16:55 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: swpnt]
Registered: 2019-12-11
Posts: 25
SixSpeed Offline
Harmless
SixSpeed Offline
Harmless

Registered: 2019-12-11
Posts: 25
Loc: New Jersey, USA
Originally Posted By swpnt
If I get a moment, I'll give it a try on my 568.2mm. It is currently running 2.59b and I have 2.12, so I will see if it experiences similar issues with multi-channel presets.

I'll report back and let you know.

Cheers,

Steve


Thanks Steve, really appreciate that.

Another thing to try immediately after doing the downgrade is first try a calibration. If it generates no pink noise from the speakers after doing the downgrade it will have the same issue as me with all DSP modes making no sound on SPDIF or Analog except the following : Direct, Music, Trifield, Stereo and the MHR 6CH Direct Input.

It's worth noting those 4 sole DSP modes that still work are the only modes that are common to 2.0/2.12 and 2.5. Super Stereo and Ambisonic will probably work for you if you have a 5.1/7.1 speaker config on 2.5, but they don't work for me because after 2.5+ Meridian disabled those 2 modes for 3/1 speaker configurations and due to the nature of my issue the logic of them being disabled in 2.5 carries over when I do the downgrade making them non functional as well. So if you have the same issue as me, you will only get sound on the 4 DSP modes mentioned and sound on Super Stereo and Ambisonic.... but no sound on all other modes.

The last thing I haven't tried (a long shot) is using a different computer to do the downgrade and flash but I doubt that will make any difference, right?


Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
Edited by SixSpeed; 2020-01-15 16:56.
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#290525 - 2020-01-16 16:17 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2007-09-23
Posts: 1,729
Syles Online content
Knows where his towel is
Syles Online content
Knows where his towel is

Registered: 2007-09-23
Posts: 1,729
Loc: London, UK
I dug out my 568.2mm and booted up my old PC to have a play with firmware swapping.

I had 2.5 on the 568 and wanted to go to 2.12

I tried to just swap the firmware with the Legacy Config programme; this seemed to work, but it still had C00049 & D5004b loaded, so gave intermittent results.

I used the WINFUP programme and loaded up 568_v2.mfp, which loaded the following files to the 568 (along with some prompted hard resets on the way):

568_212.mfu
568mft20.mfu
dspcv20.mfu
dspd5v22.mfu

This worked better, but I had problems with a few presets not playing any sounds (I tried PCM & AC3 sources). For example, I had a 'Mono All' preset that was based on the 'Mono' preset, but with party mode enabled; this wouldn't pass any sound.

I went through the firmware procedure a few more times, up and down and still had the same issues (even on 2.5 now), so I thought I'd just bricked the 568.

In a last attempt, I did the full 2.12 upload and checked again, my 'Mono All' preset wouldn't pass sound, neither would the 'Super' preset. I then tried the basic 'Mono' which worked, used the <> keys on the remote and selected party mode to on and the sound remained. Looking at the Configuration file in the Legacy Config programme, it was only the modified presets that had stopped working...

I started a new 568 configuration with no modifications and uploaded it and now everything is working as expected.

My only conclusion is that you need to do a fresh configuration after the firmware downgrade to clear out any unexpected code etc.

I hope this is of help,

Steve

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#290526 - 2020-01-16 16:39 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2002-08-28
Posts: 4,580
Mr Meridian Offline
President of the Imperial Galactic Government
Mr Meridian Offline
President of the Imperial Galactic Government

Registered: 2002-08-28
Posts: 4,580
Loc: Perthshire, Scotland
Originally Posted By SixSpeed
I downgrade the unit, and then upload my configuration file which is correctly formatted for 2.0-2.49 firmware.
Syles' investigations are very interesting here, my gut feeling is also that something is remaining in your config and it's not getting a completely clean slate to work from.

In your comment above, are you reformatting an existing config file (as suggested in the M 2.5b firmware notes), or starting with a completely fresh blank config for your 2.12 firmware?

Cheers
George

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#290530 - 2020-01-16 20:03 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: Mr Meridian]
Registered: 2019-12-11
Posts: 25
SixSpeed Offline
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Hi George,

I have uploaded brand new configs with modifications and exiting configs already made for 2.0-2.49 and neither made a difference. But all had some type of small changes to presets.
I will try reformatting the working 2.5 config and change it to 2.0-2.49 format.

--------------------

Hi Steve,

Very interesting! I knew I wasn't crazy! What's interesting is I have done a basic manual retyping on the units built in feature which should have cleared any previous settings, but did not.
However, it's true my config file is a pre-configured 2.0-2.49 configuration with modifications to Trifield and Super Stereo mode.

I will retype the unit on 2.5b9 to a default setting. Then downgrade to 2.12, then upload a basic new configuration from the Meridian Legacy Config Manager without any changes to the DSP settings.
Previously I had made new configurations but I re-made them from scratch matching my previous config with the 2 minor adjustments to Super and Trifield.

So you ended up going back to 2.5 and then back to 2.12 correct?


Thanks guys, you've been great.
Will report back.


Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
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#290533 - 2020-01-16 22:04 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2007-09-23
Posts: 1,729
Syles Online content
Knows where his towel is
Syles Online content
Knows where his towel is

Registered: 2007-09-23
Posts: 1,729
Loc: London, UK
Originally Posted By SixSpeed
So you ended up going back to 2.5 and then back to 2.12 correct?
I went back to 2.5 to check it was still working, I don’t think it’s a necessary step!

I think the steps should be:

A full firmware upload using the 568_v2.mfp via the WINFUP application.
Creating a new 568 set in the legacy config programme and upload to the 568
Edit the set in the config programme to suit once everything is working

All the best and good luck!

Steve

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#290538 - 2020-01-17 00:03 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: Syles]
Registered: 2019-12-11
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SixSpeed Offline
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Hi Steve,

I just went ahead. Flashed the full v2.12 firmware using WINFUP via the v2.12 .mfp file (568_v2.mfp). Flash was successful. I used the newer ones with the .mfq files.

Then I opened the legacy config manager. Hit the blank page icon for a new config and selected the 568 on the drop down list. Not changing a single thing, I uploaded that to the 568.

No sound in Calibration for the Left speaker which immediately tells me it will not work. Will be same issue with all DSP modes not working except the 4 I previously mentioned. Absolutely unreal. cry

I've learned that is the quickest way to verify it worked or not. If the calibration generates pink noise from the speakers, the unit is 100% working. If it doesn't, it has broken audio output issue for all DSP modes except the 4. So far only 2.5b9 works 100% and I have discovered through my previous days of troubleshooting the quickest way to verify is the immediate check of calibration pink noise.

I will now try flashing to v2.0 using the old .BAT command script and then upload another bone stock 568 config from the manager. Fingers crossed it will work.

Will report back. I'm not expecting anything to change. I'm beginning to think my 568 hates me lol.

Just badly want this to work because it would suck to lose 2-3 weeks for a repair which I don't think is necessary because it works perfect in 2.5b9. Hopefully attrition of flashing as you had to do will eventually weed the little software gremlin out of this damn thing and allow me to get back to 100% satisfaction and finally be done with this once and for all once successfully on 2.12.

Worst case if I can't get it going I'll have my wonderful little 565 Z3 to enjoy as a stop-gap if I have no choice but to send it for repair.

Time to spend another hour plus trying to get it fixed. Really hope this does it. tired


Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
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#290545 - 2020-01-17 20:42 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2019-12-11
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SixSpeed Offline
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Guys, I'm just totally at a loss here. This makes zero sense.

Spent another 4 hours last night. I have literally tried EVERYTHING. Different methods of loading the firmware, then retyping on the unit itself to a basic setting or afterwards uploading a new config with no DSP modifications. You name it I have tried it. Different combinations of DSPC and DSPD. Running the full firmware package from the MFP, Running them one by one, and even upping one by one in the Legacy Config Tool advanced tab instead of via WinFUP. No success no matter what.

I doubt it's relevant but my 568.2mm is an original 568 that was factory upgraded by Meridian to a 568.2mm in the Summer of 2003. But that was still basically a year away from the 2.5 Beta so it came back from the Factory with 2.12. The previous owner updated it to the 2.5 beta. So for the life of me can't understand why the unit can't restore itself to a fully functioning pre 2.5 beta state and pass sound on all presets and in Calibration.

Also can't understand how any config files are conflicting or left over, I've retyped it to default all analog outputs on the unit after a firmware and it doesn't pass sound. Nor does sending a new config file after finishing a firmware upload either with or without retyping to a basic stock mode first on the unit without any DSP modifications.

What version of the WinFUP tool are you guys using?? Perhaps that makes a difference? What about the Legacy Configuration Program? I am using the latest version of both from the Meridian Setup Installer but have also used legacy 861 and 1024 WinFUP version as well as old .bat Floppy Disk script to load the 2.00 firmware version default and neither makes a difference. Same issue, doesn't pass sound on virtually all modes.

There has to be a way to fix this.

So once again I'm back on 2.5 w/ the C44 861v3 DSPC Mod for working Trifield Width. However this time I created 3 new DSP presets. I created a pseudo Original Pro Logic emulation using the ProLogic On parameter setting for PLII Movie which Meridian says changes it to Original PL 4.0 decoding instead of PLII. Which is what I want for legacy Dolby SR material as well as the THX version of that mode available prior to 2.5 known as "THX". I even gained 96K internal upsampling for it which I didn't have on the 2.00/227m bad condition unit so that's neat I guess.

The third new one I made was a DSP mode I had on the 565 that was scrapped on the 568 by Meridian as its own preset but rather side parameter of Mono mode was the Academy mode. It gives you the re-equalized Mono 1.0 via the Center Speaker with rolled off treble for those old school black and white or 60s/70s mono color films.

So that gets me 95% back to what I wanted to begin with by "downgrading". Sadly, I can't get Super Stereo or Ambisonics back running 2.5b9 since they are disabled by Meridian after 2.5 if you only have 1 Surround speaker like I have in the system I use the 568.2mm with. Annoying because before the 2.5 Beta, the Dolby Stereo style 3/1 speaker arrangement I have was able to run Super Stereo as well as the 565 Z3 6.0. Super Stereo was my favorite mode for YouTube and watching non encoded Stereo video content. So now I have to use Trifield for all of that which isn't too bad as I like Trifield a lot, just prefer to use Super instead for its superior and great sounding surround extraction from non encoded material while maintaining a balanced and full sounding 3 channel stereo front spread. Ambisonic UHJ or B I never really needed as I don't use or have any Ambisonic encoded music or Ambisonic CDs. Super always sounded like a Trifield with more surround enhancement as Trifield is basically more of a 3 Channel Stereo oriented mode with extremely subtle ambient enhancement in the surrounds.

If I can get back on 2.12 or 2.0 I get everything back 100% the way I want it. But through some creativity and studying up the manual I've managed to add/restore 3 extra DSP modes on 2.5 to get me about 95% there by my estimation. It won't be the end of the world now that I have gotten Original Pro Logic back which is a big one for me given my speaker configuration, but my goal remains getting this unit fully working on Firmware 2.12 to get Super, Ambisonics and the native Original Pro Logic modes back.

So it's partly good news from my end but not exactly how I wanted to get there. The Legacy Config program has syntax checks otherwise I could hack the .MSF config file and add Super Stereo as a manual User DSP preset. But when you do this the legacy program refuses to load it. I did however get it to accept a few options not in the GUI for the emulated Original PL mode user preset which I manually edited to match exactly what 2.12 and 2.00's parameters use for it which definitely good! If I can figure out what script .exe it uses to upload the config program perhaps I can point to the .MSF with Super Stereo manually added in to bypass the check in the GUI. In theory it could allow me to get that mode back running version 2.5b9 with a 4.2 channel system.

Anyway curious to hear what version you guys are using for WinFUP, The Legacy Config Program etc.

Thank you again for all your help. I am extremely appreciative of it, you guys have been amazing!


Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
Edited by SixSpeed; 2020-01-17 20:47.
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#290546 - 2020-01-17 21:10 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2002-08-28
Posts: 4,580
Mr Meridian Offline
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Mr Meridian Offline
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Registered: 2002-08-28
Posts: 4,580
Loc: Perthshire, Scotland
Hi Six

Good that you've found some workaround tactics to get part of the way there.

Just a thought, why don't you just configure the 568 as having two surrounds, and just take the signal from either rear channel to drive your single amp/speaker, if it unlocks the DSP mode you want? Can you combine both channels into one with a custom lead?

I'll see if I can get the old firmware and Winfup off the ancient laptop I have, I seem to recall problems liberating files from it previously as it's such an old junker! I have a slightly less old laptop for tending the 861 and DSPs, but I don't think I have the same archive on that.

Cheers

George

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#290549 - 2020-01-17 23:46 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: Mr Meridian]
Registered: 2019-12-11
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SixSpeed Offline
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Thanks for that George.

Yes definitely, as I'm sort of already preparing myself that I may have to accept the workarounds I have put in place on 2.5 as the closest I will get short of a full blown professional repair.

But I don't want to give up just yet. Especially since there is nothing wrong with this unit except this glitch, it's perfect besides that which is why I am apprehensive of someone opening it all up.

Regarding your suggestion I definitely gave that some thought, particularly last night when I was carefully and methodically configuring the workarounds I derived to restore the aforementioned important DSP presets for my system. I just really don't want to do any line level mixing after the outputs as it's never ideal. Especially on a Pre-Pro like the 568 which has a very specific internal signal processing.

The beauty of the 565 and more so the 568 is that they can remix, adjust and apply the DSP to the stereo surrounds in discrete lossy/lossless Dolby/DTS/LPCM/SACD 5.1 signal to single center surround of a LCRS config on the fly with perfection.

Nobody but Meridian has ever offered this feature in any other product as far as I know and it's a truly special feature. The Meridian internal processing in a LCRS config ensures those stereo surrounds in discrete lossless or lossy movie sound tracks are correctly folded into a mono center rear with proper phase and amplitude and applying the DSP so that it matches the gain and time alignment of the system configuration.

This is among the many things that makes a Meridian 568.2mm w/ an HD621 stand out from the crowd of even modern day plain jane Surround Pre-Pros which pretty much all use the same off the shelf components and offer the same limited features. All the value to midgrade new ones now with Object Based only chipsets ditched all their legacy fixed 5.1/6.1/7.1 compatibility matrix decoding/processing with Object Based Stereo Upmixing not designed for Matrix Surround and not capable of 5.1-7.1 to LCRS like the Meridian is. Neither did the last ones before the switch to object based offer this. Even fewer offer legacy Lt/Rt to LCRS 4.0 decoding, only Bryston as far as I'm aware with their SP3 processor in Original PL mode but it lacks the ability to configure a LCRS output so it's only really for a minimum of 5.1 and not what I have. The Bryston also lacks the many fabulous 3 Channel Stereo Music modes Meridian offers. The 568.2mm allows me to have the most modern capable possible system in a 3/1.2 speaker layout without any of the Room Correction stuff that I don't like.

I'd hate to give that all up for getting that one last DSP preset out of it that is lost with a LCRS config running 2.5 beta firmware. Losing that superior internal processing for Super Stereo DSP mode in my mind is too much to give up, which is why I want to do it the right way by having the mode properly enabled on 2.00 or 2.12 firmware which supports it. If only I can just get it up and running to do so lol!!

If not I'll have to accept my loss but knowing getting it almost perfect on 2.5 is likely good as I will get anywhere else short of sending the 568.2mm in for a repair that probably won't be cheap!

Looking forward to your results on that old laptop, thanks! As well to the rest of guys that are trying this on your respective 568.2mm units.

Six


Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
Edited by Carl; 2020-01-18 00:25. Edit Reason: Redundant quotation removed.
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#290557 - 2020-01-18 15:43 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2004-08-07
Posts: 7,866
Ian Offline
President of the Imperial Galactic Government
Ian Offline
President of the Imperial Galactic Government

Registered: 2004-08-07
Posts: 7,866
Loc: Surrey, England, UK
I wonder if St Edd is around to provide a bit insight into any gotcha's?


Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 Nuc), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).
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#290562 - 2020-01-18 22:45 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2012-02-07
Posts: 579
Neil H Offline
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Neil H Offline
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Registered: 2012-02-07
Posts: 579
Loc: Andalucia, Spain
Hi

Very interesting following this thread.

Perhaps it would be easier to restore this one to the latest firmware and buy another, not updated, one.

Neil


1) MS200, G65, Revivers, DSP5000.2, DSP5000C.2, DSP3100, SME10/IV.
2) MS200, G91DH, M30, DSP33C.
3) Mac Mini (Roon), Explorer 2, Sennheiser HD6XX.
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#290569 - 2020-01-19 12:05 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: Neil H]
Registered: 2019-12-11
Posts: 25
SixSpeed Offline
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Registered: 2019-12-11
Posts: 25
Loc: New Jersey, USA
Yep this unit is "shot".

It's basically permanently stuck on the 2.5 beta. And there is no reason why I should settle for anything but what I want 100%. I just now discovered last night back running 2.5 this unit is no longer on the fly summing the LS/RS signal in DD or DTS down to my mono Center Surround anymore. Something probably broken after all these failed flashing attempts... wonderful.

That LS/RS to 1CH CS only works now on the MHR Lossless input now. Something I took as a given that was still working on SPDIF DD/DTS 5.1 input but now it doesn't either.

So I know it's not me or something I'm not doing right. I'm extremely tech and computer savvy and by now have practically the manual and the functionality of the 565/568 series units down.

This is unbelievably frustrating because I know how perfect this thing is if I can just get it right.

I do have another 568.2 which is running 2.0/227m which I got for super cheap. But it has a significantly higher noise floor indicating issues with the audio circuitry needing service.

This mint condition 568 to .2mm conversion unit I have been trying to get down to 2.12 or 2.00 has no such issues with any noise whatsoever and it sounds like it's brand new.

I'm just gonna send this thing for repair and eat the expense because I know once working on pre 2.5 firmware I won't find a better digital alternate option on the market from the same era or recently that has even remotely close to the feature set and support for an old school LCRS speaker configuration that the 500 series units have for my Music/HT hybrid system.

Thanks for all your help guys. Unless there is some miracle procedure or option we missed, I'm just gonna box it up and get it fixed. The Repair Shop guy in Georgia is my best option for the USA, correct?

Six


Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
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#290579 - 2020-01-19 19:56 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2010-02-03
Posts: 854
Mtns Offline
Pan-dimensional being
Mtns Offline
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Registered: 2010-02-03
Posts: 854
Loc: North Carolina, USA
Correct. They are the Meridian warranty repair vendor.


James
NC1: 861v4+ID40, 218, 251(to outdoors), DSP8000SE (upgraded). 5500VC, 5500s, DirecTV, Oppo BD103, QNAP251, Roon
NC2-see FL 2 with Triad Silver Speakers and Acurus Amps

FL1: G61R, 218, DSP8000SEs, 5500HC, DSP5000s, DirecTv, Oppo BD103, QNAP469, Roon
FL2: Marantz 7005, M60s, M60C, M33s, Oppo BDP-93, MS200, Roon
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#290584 - 2020-01-20 08:00 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2004-08-07
Posts: 7,866
Ian Offline
President of the Imperial Galactic Government
Ian Offline
President of the Imperial Galactic Government

Registered: 2004-08-07
Posts: 7,866
Loc: Surrey, England, UK
Originally Posted By SixSpeed
I just now discovered last night back running 2.5 this unit is no longer on the fly summing the LS/RS signal in DD or DTS down to my mono Center Surround anymore. Something probably broken after all these failed flashing attempts... wonderful.
Rear centre surround, ie as per 6.1 etc? I don't think Meridian supported a single rear centre with 2.5?



Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 Nuc), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).
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#290608 - 2020-01-20 21:54 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: Ian]
Registered: 2019-12-11
Posts: 25
SixSpeed Offline
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SixSpeed Offline
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Registered: 2019-12-11
Posts: 25
Loc: New Jersey, USA
They still do in the options even on v2.5. And one of the few companies that supported this legacy LCRS (3/1) analog surround speaker configuration in the digital domain on their 500 series surround processors. When digital came out, virtually all processors only supported a minimum of 3/2, but Meridian kept support Professional and earlier Analog 3/1 arrangement. It's same as 5.1 except with 1 surround in between the Ls/Rs and the placement of that speaker is basically where the Center Back in a 6.1 arrangement goes. Same LCR 3 channel stereo array upfront.

In the system I use my 568.2mm, I have a 3/1 system aka LCRS which uses a single center rear surround speaker. In the Theaters back in the day this system used multiple surround speakers playing back the same center rear signal in Dolby Stereo. At home you can use just 1 center back more or less between where the Ls/Rs speakers in a 5.1 system are placed. It's an old school config, but I run this since the system I use the Meridian processor in is a Hybrid Music and HT system and I only have a good place for a Center Rear speaker in that room... and one that is much larger than typical surround satellite's so it sounds really good and fills up the entire surround area with wide dispersion of sound. Since Meridian supported this configuration on the 565 and 568, that was the biggest reason I got into their 500 series upgrading from purely analog playback and decoding which would allow me to enjoy DD and DTS content for movies instead of mixing them down to Lt/Rt to feed my decoder.

Dolby Stereo encoded material decodes directly into this 4.0 LCRS speaker configuration in Original Pro Logic mode plus any additional amount of subwoofers integrated via High Level Input and or LP filering where the mains roll off.

When playing a discrete digital 5.1 Dolby or DTS signal, with a LCRS configuration on the 565, 568 or 568.2. Meridian's internal DSP properly internally sums the Stereo Surrounds into a single mono center back signal for playback on a LCRS system. Applying the correct phase, gain and time alignment at the same time. Meridian is the only company that made a Surround Processor to do this internally and digitally without separate mono downmixing which is great.

I have since switched back to my other 568.2 (Has some noise issues when no signal being played) running 2.12/238m and this works again perfectly over SPDIF for DD/DTS and MHR link for DTS-HD/TrueHD and SACD 5.1 material. Just as it did on the 565 Z3 v6.0. Center Rear gets a real time mono mix of the Ls/Rs signal courtesy of Meridian processing.

Yesterday I repacked my stuck v2.5 568 for repair and will be reaching out to The Repair Shop to get the unit repaired to run v2.12 firmware.

I will update all you guys regarding what they say as I'm sure you are all curious what why the unit is effectively permanently stuck on v2.5b9 firmware!


Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
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#290619 - 2020-01-21 18:50 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: SixSpeed]
Registered: 2004-02-02
Posts: 135
GovCon Offline
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GovCon Offline
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Registered: 2004-02-02
Posts: 135
Loc: Frederick, Maryland, USA
Hi Six,

Would you elaborate more on the Trifield fix you mentioned? "2.5 w/ the C44 861v3 DSPC Mod"

Also, I understand your pain about the 568.2MM. I went through two rather significant repairs on mine within a year. First time was the MHR/MM board going out. Second was the analog audio section.

Now, I'm dealing with a potential problem where all audio will drop out where as when the unit went in for repair, the left channel (if I remember correctly) would go dead after a few minutes of operation.

So far I've been able to keep the unit functional by just leaving it powered on standby. Before I would physically turn it off as it's currently at my vacation home which I'm not there all the time.

I've gone through these headaches because I too love how the 568.2MM sounds and in many ways more than the G65 I bought to replace it in my main system.



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#290654 - 2020-01-24 03:28 Re: 568.2mm No Sound on Select DSP Presets After Firmware Downgrade [Re: GovCon]
Registered: 2019-12-11
Posts: 25
SixSpeed Offline
Harmless
SixSpeed Offline
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Registered: 2019-12-11
Posts: 25
Loc: New Jersey, USA
GovCon,

Glad to know I'm not alone! On alternate 568.2mm,the one I'm using now that runs 2.12 (never upgraded to 2.5), just the other day watching YouTube it would lose PCM 48K Lock with the SPDIF Optical out of the TV and generate no sound when a YouTube video would end and the next one would start with no sound. Switching to a different source and going back to the SPDIF Source fixes the issue, very weird.

It did it again and I just shut it off and turned it back on... oldest trick in the book which seems to work. Definitely annoying we have to deal with these annoyances due to the age of this product, but the features, integration in our system and sound quality is what keeps us willing to deal with it!

Generally I agree 100% with leaving the unit "on" on Stby mode is probably the best bet as it causes less wear and tear on the internals, chipsets and other components than having it off and turning on to use it. The initial powering on phase and surge of electricity associated with it definitely shortens the life of any electronic component, which is why lots of high end audio companies now a days prefer the operation of their products in standby mode rather than turning it off entirely. Another thing is they generally sound better once already powered and running rather than turning it on from a cold start, this is more subjective but I believe there has to be some more science to back this up.

Regarding the Trifield situation, Basically the 2.5b9 Beta Firmware for the 568.2mm totally broke the Trifield "width" adjustment parameter so that adjusting the width from the default 1.0 spec has no effect. Now, since the Beta Firmware makes the 568.2mm's computers and logic conform to the 861v3/v4 and G68 spec it allows the DSP-C logic software to be swapped for earlier 861v3 versions. Specifically an older version of the 861v3 DSP-C logic, version C00044. Installing it on the 568.2mm w/ 2.5b9 firmware will give you a disclaimer error on the flash and a "Bad Software" message on the unit, but this is merely from identifier headers of the logic software stating the 861 and not the 568.2mm 2.5. So it's just a syntax error that can be ignored, it does not hamper or intrude the function of the unit. It works perfectly fine with the 2.5 because that update effectively turned the 568.2mm into a mini 861/G68. That older version of the DSP-C software logic made for the 861v3 does not have the Trifield width glitch, and is a trick some 568 owners have used for years.... but it does slightly change the sound of the unit. It sounds a bit warmer and thicker but I preferred the C44 firmware's digital filtering on 16/48kHz PCM via SPDIF compared to the digital processing in the C49 DSP-C logic that comes 2.5b9. Apparently C49 uses totally different filtering techniques for PCM and SPDIF input and has a bit of a sharper airier treble, almost too hot at times on logic DSP presets like PLII Movie. And of course the Trifield width parameters work just fine and don't have the glitch where they don't work on C49.

Compared to 2.5, I greatly prefer the function and sound of the unit on 2.12/238m. IMHO its the Holy Grail firmware and functionality for a 568.2 especially with the MHR module, which keeps the processor super relevant for today's lossless 5.1 formats and SACD Multi-CH with the exception of Object Based surround of which I have zero interest in. I think it's a gimmick, but that's just me!

Perhaps give the C44 DSP-C logic a try sometime, you may like it! And if you can successfully downgrade to 2.12, I think you may like that even better.


Meridian 568.2mm | HD621 MHR Link | Pioneer UDP-LX500 | Bryston BDA-3/BDP-3/BIT15 | Furman P-1800
McIntosh MC206 | Marantz MA500 | Supra Sword, Audioquest & Wireworld Cables | Sony A8F 65" OLED
Klipsch Heritage 70th Anniversary Klipschorns & 70th Heresys [3/1] | 2x REL T9i via REL Arrow Wireless [.2] | SVS Wireless Transmitter
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