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Joined: Apr 2004
Posts: 12,733 Likes: 88
Don't Panic!
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Don't Panic!
Joined: Apr 2004
Posts: 12,733 Likes: 88 |
Will the Meridian accept/decode bitstream on its 3x SPDIF inputs? That would indeed be a miracle.
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Joined: Aug 2007
Posts: 341
Hitchhiker
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Hitchhiker
Joined: Aug 2007
Posts: 341 |
Mark,
"Low noise floor makes a huge difference. "
Agreed.
"Measured mine using Earthworks M30BX mic, 1021 ZDT pre-amp and TrueRTA."
I will have to try that at some point. I have TrueRTA and the ETF mic/pre-amp but never used TrueRTA for SPL since it has to be calibrated every time you use it for SPL.
Shawn
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Joined: Jun 2006
Posts: 1,653 Likes: 1
Working on the ultimate question
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Working on the ultimate question
Joined: Jun 2006
Posts: 1,653 Likes: 1 |
I will have to try that at some point. I have TrueRTA and the ETF mic/pre-amp but never used TrueRTA for SPL since it has to be calibrated every time you use it for SPL.
Shawn I believe TrueRTA remembers the SPL level if you don't change things between sessions? If not, it's not too difficult to set up. Mark
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Joined: Aug 2007
Posts: 341
Hitchhiker
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Hitchhiker
Joined: Aug 2007
Posts: 341 |
Mark,
It might but it would be pretty easy for a mixer setting in windows to get altered which would through off the calibration. Likewise my mic pre-amp is just a rotary dial for on/off and input level so it would not be in exactly the same position every time it was used which would also throw off the SPL calibration. I have always just used TreuRTA for relative differences, not absolute measurements.
Shawn
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Joined: May 2000
Posts: 8,364 Likes: 14
President of the Imperial Galactic Government
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President of the Imperial Galactic Government
Joined: May 2000
Posts: 8,364 Likes: 14 |
Jerry, "As to the compressed soundtracks, if its regular DD, I think Id prefer the Meridian to decode it but I think many discs will now feature the high res sound............." Will the Meridian accept/decode bitstream on its 3x SPDIF inputs? I thought it was basically expecting PCM when configured in that manor? With my board tapped into the signal feeding the DACs you get PCM output all the time. If one really wanted bitstream for DD/DTS it would be easy enough to simply use the players stock SPDIF output into another input on the Meridian for that. "One thing I like about my XA1 player is it will take a True HD track and downsample it to DTS 1.5 so it works over SPDIF to the 861. Sounds great when compared to the standard DD track." Sounds better when you don't lossy recompress the lossless track at all though.  Shawn That's the problem. The player will only ever send PCM to those DACs that get tapped so you'll never see any encoded data over them (so whether the Meridian can deal with encoded material over 3xSPDIF is moot in this context). And yes you can use the auxiliary SPDIF output available on all players but you usually have to configure where your audio is to be sent (Analog Outputs, SPDIF or HDMI). Maybe some players simultaneously output to both, that would be ideal and great for comparisons.
- Fiddler (IMHO)
If you think listening to music is fun, try learning an instrument.
HT: G61RSL, 4x5K, 5.5KHC, 2xSC6000, Transporter, HD621, Philips BDP7501 4K, Tivo, 65" LG OLED 4K C6
Computer: Foobar2000, 5K, Mojo, HiFiMan HE1000 V2
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Joined: Jun 2006
Posts: 1,653 Likes: 1
Working on the ultimate question
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Working on the ultimate question
Joined: Jun 2006
Posts: 1,653 Likes: 1 |
Mark,
It might but it would be pretty easy for a mixer setting in windows to get altered which would through off the calibration. Likewise my mic pre-amp is just a rotary dial for on/off and input level so it would not be in exactly the same position every time it was used which would also throw off the SPL calibration. I have always just used TreuRTA for relative differences, not absolute measurements.
Shawn Right. So you'd just need to do the SPL calibration prior to your noise floor reading. A little extra work, but nothing too onerous. Generally speaking I also use TrueRTA for relative work and then calibrated SPL is not a concern. Mark
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Joined: Feb 2003
Posts: 267
Hitchhiker
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Hitchhiker
Joined: Feb 2003
Posts: 267 |
Background noise is measured according to NC22. Here is a sample link: NC22
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Joined: Jun 2006
Posts: 1,653 Likes: 1
Working on the ultimate question
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Working on the ultimate question
Joined: Jun 2006
Posts: 1,653 Likes: 1 |
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Joined: May 2000
Posts: 2,314
Senior Shouting Officer
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Senior Shouting Officer
Joined: May 2000
Posts: 2,314 |
I guess you are right on this.... just make sure the DD decoder is good then.
best regards,
Jerry
Best regards,
Jerry
Main System: 861v6, DSP8000s in corners, DSP7000s Center and Sides, 1-9 humans.
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Joined: Aug 2007
Posts: 341
Hitchhiker
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Hitchhiker
Joined: Aug 2007
Posts: 341 |
"Maybe some players simultaneously output to both, that would be ideal and great for comparisons."
I'd have to check some HD players to be sure but for plain jane DD/DTS I'd be surprised if the player couldn't have analog outputs active and send bitstream DD/DTS out its SPDIF output at the same time. Regular DVD players with analog outputs have been doing that for a very long time. They just pipe the bitstream to the SPDIF transmitter while also decoding that format in their DSP to feed PCM to the DACs.
Shawn
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Joined: Feb 2004
Posts: 1,560 Likes: 1
Working on the ultimate question
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Working on the ultimate question
Joined: Feb 2004
Posts: 1,560 Likes: 1 |
Vince,
How can you wait so long to try this? I would have dropped everything as soon as it arrived and watched a couple movies to have a listen. You have will power that's for sure.
Ron
HT: 568.2mm (Revelation One filter), 518x2, SB3, Bryston 7BSTx3, 8BST, Aerial 10T, CC3, SW12(Qty2) w/SVS AS-EQ1, MK Tripole x4. JVC RS1u, DVDO Duo, Oppo 103 w/Vanity103HD, Sony PS3, VIP 3D Theatre, Acer H5360. Logitech Ultimate Remote and Hub.
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Joined: Jan 2005
Posts: 854 Likes: 5
Pan-dimensional being
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Pan-dimensional being
Joined: Jan 2005
Posts: 854 Likes: 5 |
Hey Ron,
It ain't willpower, I assure you. Its the MIA 861 ID20 card. I've given up on aquiring it through my local dealer due to the Canadian Distributor's (Aralex) colossal ineptitude. There is light at the end of the tunnel though, M USA hooked me up with one of their biggest dealers, an installer in PA, and he is expediting one to me this week. After completely re-jigging my room as noted previously, I only want to re-configure the 861 once!
Happy Trails!
Vince@Freewheelcycle.com
Last edited by VinceHoffman; 2008-02-24 17:30.
2ch: Jay's Audio CDT2 Mk3, PS DirectStream Dac, Oracle Delphi VI/SME V/Benz LP-S, Coincident Statement Linestage, Foundation Research V5 Phono, JL Audio CR-1 xover
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2x or 5x ATC SCM20ASL mk2, 4x SCM12i, 4x Seaton Submersive HP, AM2.0 sub EQ
Video: JVC X990, Isco 3L A-lens/sled, 105" motorized 2.37:1 AT screen
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