Your understanding is correct. The HD audio formats are lossless and the decoder should be bit exact, so there should be no difference in the audio with 8 channel PCM or passthrough.flash_uk wrote:Have read the entire post and wanted to check if I understand the current position with RPi2 and RPi3...is it correct that:
- Hardware constraints mean that neither RPi2 or 3 will ever offer passthrough of TrueHD or DTS-HD MA
- Both Rpi2 and 3 CAN decode both TrueHD and DTS-HD MA, and output 8 channel PCM at 48kHz
So one additional question: how different in quality is audio output as 8 channel PCM at 48kHz versus audio output by an amp decoding say TrueHD or DTS-HD MA?
There are some extensions like ATMOS which your receiver may be able to do something with, but ffmpeg doesn't, but I believe they are mostly for systems with > 8 speakers.