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[Zhillsguy]

I just hooked up the HiFi Shield+, it has two RCA and one toslink output. Using version 102.

Using the toslink with no encoding everything converts to 2 channel and all files play perfectly.

When activating Dolby Digital encoding to achieve 5.1 sound there is an audio glitch about every 7 seconds, regardless of type of material played (2 ch, 5.1 ch, MP3, FLAC). The glitching may not start immediately during playback.

I tried different options,  adjusting the buffer time under device settings, options for memory playback, etc. It seems increasing the buffer may help delay the glitching for the first few minutes but once it starts it is consistently around 7 seconds. I didn't try adjusting Period Time.

This is happening in both the Volumio/LXDE and stock Ubuntu MATE (from Odroid) OS's. If this were a lesser machine such as a Pi I would consider other things like current disk/cpu load, etc., but this C2 flies through everything. The music is on a mounted network drive, gigabit network.

Any suggestions? Is this a possible board  or DAC timing issue? Anyone else using 5.1 DD Encoding successfully? I haven't tried going back a build or two.

Thanks.

[Zhillsguy]

As a follow up, I tested more using my little AMD A4 Lenovo laptop running Mint 18.3 and a Creative SB1090 DAC. Multichannel playback using DD encoding with the toslink output worked flawlessly, so I chalk it up to the Odroid board/DAC. Stereo plays great up to 384 KHz native on the Odroid, so no worries here.

[bob]

I'm thinking that encoder might only be single threaded so it could be cpu limited.