Quote:
Originally posted by gonk:
Playing two sources at once when both are stereo analog is relatively straightforward, but when you start mixing audio formats (as you are bound to do when dealing with a modern surround sound setup) would be very complicated.A CD will be PCM stereo, which doesn't require decoding by the DSP prior to surround processing, but I would expect mixing two PCM digital signals outside the DSP will take some additional hardware. Your Xbox360's games are playing back as a Dolby Digital bitstream (hence the 5.1 sound), so the processor has to decode that into raw multichannel PCM before applying other DSP. That means it can't be mixed with something else outside the DSP, so you would need a DSP with multiple inputs and the ability to mix those inputs downstream of decoding. And that doesn't even address issues with audio levels (DVD's are mixed lower than CD and broadcast TV to preserve headroom), which will require some sort of system to manage unless you want to be at the mercy of individual sources.

Bottom line: I may be missing something, but I don't see how it would even be possible to mix multiple audio inputs in a surround processor without significant cost and complexity.
OK thanks . I just sucked it up and listen to the music in Dolby. Oh well doesnt matter anyways with the noise from the game. cool