[vorbis] Lossless/lossy hybrid?

[Wilson]

DVD-Audio: Sampling rates - 44.1, 48.0, 88.2, 96.0, 176.4 and 192.0 kHz, 16,
20 or 24 bits. PCM format.
SACD:  Freaky "DSD" (Direct Stream Digital) format, rather than PCM. I'll
quote a Phillips page, since I don't really understand the details of this
new format:
"DSD is a revolutionary process based on 1-bit sigma-delta modulation, and
operates with a sampling frequency of 2.8224 MHz."
I gather that this makes it capable of an arbitrary number of channels, and
roughly 100KHz of sampling rate.
They also spout some marketing-speak about "better time resolution" and "low
pass filters" that removed roadblocks that "fundamentally degrade
traditional PCM audio."
Basically, there's not a lot of free technical info on SACD out there right
now. You can create DVD-Audio compatible PCM WAV files in any decent audio
application, like Sound Forge.

----- Original Message -----
From: "Karol Pietrzak" <noodlez84 at earthlink.net>
To: <vorbis at xiph.org>
Sent: Thursday, May 31, 2001 3:46 PM
Subject: Re: [vorbis] Lossless/lossy hybrid?

> On 31 May 2001, Wilson wrote:
>
> > I definitely agree with this. CD audio in general sounds like
> > crap. DVD-Audio/SACD is a big step in the right direction.
>
> out of curiousity, what are the technical specs of dvd-
> audio/sacd (i.e. how many khz, how many bits)?  anyone know?  is
> there any lossy / non-lossy, free / non-free that can handle
> that right now?
> --
> noodlez:   Karol Pietrzak
> GPG/PGP-KeyID: 0x3A1446A0
>
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