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Low data rate stereo MP3 encoding distorts the stereo signal such that matrix encoding is disrupted (I tried MP3 on several DS encoded CDs to verify this).
I suggest using a simple matrix encoding method (maybe DynaQuad, to provide just one surround channel, which can be easily decoded with a "speaker matrix") on stereo CDs, this would "add value" to the original CD because the surround sound portion would probably be damaged by MP3.
Unlike 30+ years ago, mono compatibility of DynaQuad isn't much of an issue because even the least expensive CD player I've seen has stereo outputs.
Kirk Bayne
www.geocities.com/lislislislis/avdtv.htm
I suggest using a simple matrix encoding method (maybe DynaQuad, to provide just one surround channel, which can be easily decoded with a "speaker matrix") on stereo CDs, this would "add value" to the original CD because the surround sound portion would probably be damaged by MP3.
Unlike 30+ years ago, mono compatibility of DynaQuad isn't much of an issue because even the least expensive CD player I've seen has stereo outputs.
Kirk Bayne
www.geocities.com/lislislislis/avdtv.htm
