SPMC and no multi channel sound for AAC / PCM

chinrest

New member
Jan 5, 2016
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Minix neo U1, SPMC, Sony STR-DN1010 7.1 Surround.
Audio settings above passthrough left on defaults initially
All passthrough audio settings enabled apart from Dolby transcode

After coming across AAC 5.1 but getting PCM 2.0, I changed number of channels to 7.1 and lost sound altogether.

No matter which audio device option I choose from Android PCM / passthrough IEC / passthough RAW, sound is only heard when channels are set to 2.0. I'm not sure why I'm missing multichannel PCM as this worked on my Pi3?