[Pkg-alsa-devel] Bug#912824: Bug#912824: Distorted sound with some headphones.

[Gong S.]

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No, the connection is not loose.
It looks like that this issue only happens on "Apple" earphones (as well as the "Apple mode" on some earphones). There is a button on the earphone, and if I hold down the button, there is no problem playing. But I cannot hold it forever.
The distortion problem is Linux-exclusive. I do not know the course. All music files have this problem but not very noticable. It becomes noticable with speech. Holding the button solves the problem.
The "wrong channel" problem exists in Windows too, but not in devices such as an Android phone or a Nintendo 3DS. Again, holding the button down solves the problem.
Maybe it is related to this: https://mashtips.com/apple-headphone-on-android-or-windows/
Apple has its own implementation of TRRS and I guess the button disables the mic and other "special features".
So it is a hardware problem after all. But I hope you to provide some sort of software workaround.
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