Frédéric Pierret was the first here to identify a possible origin for
the problem. And Marco did preliminary work on this. The "jcs way" looks
promising to me, but surely it requires a lot of work. I'm joining you
on the fact that we might never get help from Realtek on this, but I
don't think we should disregard community's effort :)
On my side, I also have a Realtek ALC1220 codec
Codec: Realtek ALC1220
Vendor Id: 0x10ec1220
Subsystem Id: 0x18492220
Revision Id: 0x100101
equipped on an ASRock B450 Gaming-ITX/ac motherboard ("AMD Promontory B450"
chipset).
The sound coming out the green jack is OK.
The sound recorded from the microphone plugged on the pink jack is crackling.
I'm running Linux 4.19.44.
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https://bugs.launchpad.net/bugs/1801540
Title:
Microphone distorted sound on ALC892/1220 on AMD chipsets
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