Will a Proceed AMP handle LPCM input?

I'll first confess that I don't really know what I'm talking about. But, as I understand it, I think that LCPM (linear pulse-code modulation) is simply a means, and a pretty standard means, of encoding digital information. It's used in CDs. It's used in DVDs. The DACs on the AVP clearly accept and can decode digital streams from both CDs and DVDs, so it can obviously handle LCPM. LCPM, however, can also encode up to what we might call high definition (i.e., bit depths and sample rates over the 16/44.4 that is the Redbook standard). LCPM is used in BluRay, for example. While the AVP will certainly decode certain multi-channel codecs – anything clocking in at what we might call more modern high-def sample rates or bit depths, or any of the more modern multi-channel codecs – none of them existed when the AVP was in production. So, it's virtually certain that they will not be supported. Thus, I suspect LCPM or no is not the determinative question. The question will be what you're encoding by those means. Make any sense?

And at the risk of making things more complicated (yet, honestly, in an effort to simplify) worth specifying exactly who is doing what. Your source material, to start. I am not sure what a HD/Master Audio track is – but assuming it is either HD or a modern multi-channel codec (seems safe) – then the answer is No. The DACs on the AVP won’t have the slightest idea what to do with it. You mentioned using the PS3 to “decode” these tracks. As I would use that word, this means using the DACs on the PS3 to convert these tracks from digital to analog. If you could then offload a multi-channel analog signal from the PS3 (which you cannot, it only supports stereo analog output), you could use the DAC on the PS3 to do the heavy D to A lifting and then go multi-channel analog into the AVP just fine. But, again, you can’t. So, as it turns out, the only way to get multi-channel info off of the PS3 is digitally, so that means you need an off-board DAC with the grunt sufficient to do the decoding for whatever format you’re using.

OK, little more info. DTS-HD Master Audio (which I now get is what we're talking about) is a HD multi-channel codec used in BluRay (among other things). Think it was created in 2009. There is absolutely no way any Proceed product will be able to decode this format. Proceed folded long before it was created. That really should be the whole story.