Originally Posted by jeff.lebowski
AC3 5.1, DD 5.1, DTS 5.1 are not PCM, correct?
All of those codecs are essentially zip files. The original PCM soundtrack, which is quite large, is compressed by the encoder to save space on the disc. The decoder decompresses the track back into PCM for processing by the sound system. PCM is the digital audio format that nearly all home entertainment equipment is designed to process. There's no faking it. Your playback equipment will either send an encoded (zipped) format such as DD 5.1, which the receiver will need to decode, or it will do the decoding itself and send the resulting PCM.
When using HDMI, unexpected stereo transmission is usually caused by an HDMI handshake with a TV, which is a 2 channel device. So, if you have set your player to output multichannel PCM and you are getting stereo instead, look for a receiver setting that disables the HDMI audio connection to the TV. As a test, you can simply disconnect the HDMI cable to the TV and see whether you start getting multichannel sound.Edited by BIslander - 4/18/13 at 12:51pm