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LG CX passed through audio over EARC crackling/popping/static #586

Description

@TheN00r

Moonlight Version

v1.6.36

Device Type

webOS TV

Device Model

LG OLED65CX6LA

Device OS

webOS 5.6.0-14

Host OS

Windows

Host Software

Sunshine

Host Setup

RTX 2080ti Windows 11, virtualdisplaydriver, steam streaming speakers/regular high def speakers.

Bug Description

Videostream starts fine using NDL, sound plays on TV, but as soon as I enable eARC I only get output that sounds like insect wings flapping real fast. other backends are able to get passed through without distortion but end up as 2ch pcm at my avr. Had the flapping sound once with Pulse too after a while when i was forcing 7.1ch in the ini.

Reproduction Steps

Host running latest sunshine, start webosclient, 4k 50m/s 5.1 surround through NDL. Stream starts without problems, "flapping" starts

Expected Behavior

5.1 or 7.1 channel pcm being forwarded from tv to eARC. This is the case with other HDMI sources > HDMI in on LGCX > via eARC hdmi out > AVR showing 5.1 channel pcm without error.

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    audioIssues related to audio playbackbugSomething isn't working

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