Movie with 6 audio channels inaudible on Android

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I've noticed this behavior with FLAC audio, but never AAC. I have also noticed that "maximum audio channels" client settings are rarely (if ever) respected with regards to forcing transcoding. I avoid FLAC like the plague because of this problem. Can add fuel to the fire or try to recreate, but the only portion I'd be able to verify is the lack of client audio channel setting respect.