Originally Posted by George Mills
You need to sample at LEAST 96khz to capture the 48Khz information. You're not trying to capture the 22Khz "Analog". You are trying to RESAMPLE a SAMPLING of the music.

You and I are in complete agreement that you must sample at least at 96kHz to capture high frequency content of 48kHz. Theoretically you only need to sample at 96kHz, but to avoid aliasing distortion at and below 48kHz, you would probably want to sample a little higher and use a gentler than brickwall filter at 48kHz.

Does Bob Stuart believe that such high frequency content is either audible or otherwise significant for the reproduction of music? My recollection is that he does not.

Personally, I find Bob's argument persuasive that sampling at 96/24 is overkill, but given a choice I would rather perform analog to digital conversion of a full-range analog signal at 96kHz or 88.2kHz rather than 48kHz or 44.1kHz. It is what I do when I record, mix and master in Pro Tools.

Is there even high frequency content from music or movies at 48kHz on the analog outputs of an 861 to sample? I sincerely doubt it.

Is their high frequency content from music or movies up to 48kHz in the analog bass signal with the crossover set at 80Hz? I do not believe there is. Therefore, I do not believe sampling of such analog bass signal at 96kHz necessary. I believe that sampling such analog bass signal at 48kHz is more than adequate.

If Ken is performing analog to digital conversion on a full-range analog signal at 48kHz, I think he is doing himself a disservice, regardless of whether the analog signal is coming from his Meridian 861 or his ADA Mach IV.

If Ken is performing analog to digital conversion on in the analog bass signal with the crossover set at 80Hz, then I don't think it matters whether he samples at 96kHz or 48kHz.

My guess is that Ken perceives the ADA as having more "bass slam" because the bass output when he had the Meridian 861 in the system and when he had the ADA Mach 4 in the system were not accurately level matched. But hey, I haven't heard either processor in his system so what do I know.

I think the issue of "bass slam" has absolutely nothing to do with sampling frequency. It's a red herring. Other factors, real or imagined, are at work.

Now, I'm playing with my bluegrass group tonight so I have to go work on my guitar breaks. You work on your fiddle. One of these days we may have a chance to play together. We need a fiddler.

561, DSP5500s, DSP5000C, analog sides and rears