2CH and MCH tracks hence need to be extracted individually. MCH albums have also 2CH tracks on them but there are a few very rare exceptions known (mostly classical concerts it seems). A MCH album would be 4x the size of an equivalent 2CH album without using DST compression! SACD ISO's with just 2CH tracks on them are mostly not DST compressed but when combined with MCH also those 2CH tracks are always compressed to reduce the total disc size. Having a DSF track you can be sure it is not compressed with DST anymore and only DSF supports tagged meta data making it the most popular extraction format. DSF (Sony) does not facilitate DST compression but DFF (Philips) does optionally. Both are maintaining the original DSD 1-bit sampling format of the ISO. Individual tracks can next be extracted from the full SACD ISO in DSF or DFF file format. It is not possible to distinct the various options used without opening the container. The SACD ISO contains all 2CH and/or MCH DSD tracks with or without DST compression as the final result. Obviously that layer can be ripped using normal DAE (Digital Audio Extraction) tools if desired too. Ripping an SACD results in an SACD ISO container with the DVD layer content only. Came across a curious collection of Quad LP recordings transferred by a studio to DTS-CD's which sound amazingly well this despite the age of the original recordings. Now only BD Concerts with occasionally MCH DD/DTS audio tracks on them are actively produced by the big labels. For music we first saw Quad LP, next MCH SACD, DTS-CD, DVD-Audio, BD Pure Audio. There is a curious parallel between MCH music and 3D Video as both formats keep disappearing and making a come back with a newer technology. On some regular CD's the DSP provided up-scaling to DTS/THX 7.1 with my HT AMP produces pretty nice results too. Really love the MCH sound on various SACD (DTS-CD/BD) music albums now. Learned it myself the hard way changing my speaker setup in various steps. I know it is a big temptation to use simpler/cheaper speakers for center and back channels, but frankly you should not do so when targeting for MCH 5.1 music listening too. It may result very acceptable for movies (getting those effects) but definitely not for top quality music reproduction. Using a mixed bag of speakers for front, center and back channels never gives satisfactory audio results. It is my practical experience that you can only squeeze out maximum MCH 5.1 sound quality using a consistent choice of speakers (same brand and even model range). With my setup all visitors can hear it doing A/B blind tests. For the excellent SACD format it seems that these innovations just came too late which is a real pity as the quality difference is a lot easier to perceive. The accuracy and phase jitter of the clock oscillators feeding a DAC was found to play a huge role in sound reproduction. Now 30 years later this all changed as not only the quality of the DAC's and AMP's improved but also the clock circuitry used with it made many improvements steps. This caused a lot of debate if DSD was really superior to PCM (CD SACD). Producing DAC's that could handle the DSD format well did not really exist yet and very few people having a quality 5.1 audio setup to truly enjoy MCH. SACD was maybe developed and marketed too early in time by Philips/Sony. Truly enjoying MCH music and SACD playback! SACD's sales almost came to a hold with just a few small labels still producing them for a very specific audience. MCH SACD albums always use DST compression to make them fit on the DVD layer. To make bigger contents fit on the SACD layer this may be compressed using DST (Direct Stream Transfer). The exact content/playback capabilities are always displayed on the disc and labels accordingly. So a HW based SACD player lets users then select CD, 2CH or MCH playback for those albums having all three on them. The SACD layer has mostly 2CH (=Stereo) tracks but may optionally have MCH (=Multi Channel 5.1) tracks additionally. There are a few DSD128 and even fewer DSD256 original studio SACD's with higher sampler rates. ![]() SACD discs are commonly Hybrid with a normal CD player first layer for backward compatibility playback on ordinary CD-players and a second SACD layer (DVD type data layer) for SACD playback in DSD64 1-bit sample format on specifically SACD capable players. Introduction to the SACD disc basics and options
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