fra wikipedia:
"Overview
SACD uses a very different technology from CD and DVD-Audio to encode its audio data, a 1-bit delta-sigma modulation process known as Direct Stream Digital at the very high sampling rate of 2.8224 MegaHertz with the typical sampling rate present on audio CDs currently being 44.1kHz at a resolution of 16 bit.
SACDs must always contain a 2-channel stereo mix and may optionally contain a surround mix either 5.0 or 5.1 layout. Although the disc always stores all channels, the surround mix does not have to use them all, and some may be mute; for example the 2001 SACD release of Mike Oldfield's Tubular Bells remained in the old quadraphonic 4.0 mix. The correct designation for the surround part of a SACD is "multi-channel", and usually has its own "Multi-Ch" logo on the back cover.
There are three types of SACDs:
*Hybrid: The most popular of the three types, hybrid discs include an audio CD "Red Book" layer compatible with Compact Disc players, dubbed the "CD layer," and a 4.7 GB SACD layer, dubbed the "HD layer."
*Single-layer: Physically a DVD-5 DVD, a single-layer SACD includes a 4.7 GB HD layer with no CD layer.
*Dual-layer: Physically a DVD-9 DVD, a dual-layer SACD includes two HD layers totalling 8.5 GB, with no CD layer. This type is rarely used. It enables nearly twice as much data to be stored, but removes CD player compatibility.
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Jeg tolker dette som at en hybrid SACD kan innholde inntil:
1. Rent CD (stereo) lag
2. DSD stereo lag
3. 5.1 DSD lag
Folk med mer erfaring enn meg med sacd kan kanskje utdype.
mvh
Knut