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Like the title says. I've been wondering about this for awhile. I would assume it varies but I was wondering if there is a generally accepted practice for creating the CD Redbook layers on Hybrid SACDs?
Mastered specifically for CD Redbook layer at 16bit 44.1khz?
Downsampled from the SACD Stereo DSD layer to CD Redbook standard?
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Don't quote me on this but if I remember right, the redbook layer is usually downsampled from the DSD layer.
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Post by Claude May 29, 2012 (3 of 7)
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I think the vast majority are, although there are a few notable exceptions.
For the Mercury Living Stereo SACDs, the early 1990's CD transfers by Wilma Cozart were reused for the CD layer, so one actually gets two different transfers on the hybrid SACDs.
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Post by steviev May 29, 2012 (5 of 7)
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MattMan657 said:
....Mastered specifically for CD Redbook layer at 16bit 44.1khz?
Downsampled from the SACD Stereo DSD layer to CD Redbook standard?
It's hard to believe that any original DSD recording would be simultaneously recorded at 16/44, because that would require, at a minimum, two different sets of recording equipment, if not two different sets of microphones and cables. It's prohibitively expensive enough, as attested to by BIS head honcho Robert von Bahr, to record in DSD multichannel as it is. It think you can safely assume that, for any modern recording, they're downsampling the original DSD (or hi-rez PCM) to 16/44.
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Post by tailspn May 29, 2012 (6 of 7)
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steviev said:
It's prohibitively expensive enough, as attested to by BIS head honcho Robert von Bahr, to record in DSD multichannel as it is.
You are correct if a recording kit amounts to a bin of mic stands, a briefcase sized carry-on padded case of mics, another case of mic pres, A/D converter and cables, and a laptop loaded with Samplitude recording software and earphones.
But many production companies, like, SoundMirror, Channel, and Polyhymnia, among others, truck out speakers, a mixer, and a digital workstation like a Pyramix (most also have a second workstation and A/D converters as spares). For them, the cost of recording in PCM (DXD included), or DSD is identical, as is also stereo or multi-channel.
Some companies, like Channel, do an on-site session mix and balance, and record (track) that along with the individual mic pres. Others track every mic to a separate channel and do a balance and mix in post. Either way, it's the same money.
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Post by AmonRa May 29, 2012 (7 of 7)
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Downconversion would be a better technical term, as the process is mathematic and does not involve resampling.
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