> Headphone or Headset. Which did you use?
> I don't know your platform has headset mic support or not.
I use headphones (no mic). I suppose my laptop should support a mic,
because there is an icon next to the headset socket which shows a
headset with a mic.
> Could you record sound via headphone?
>
> I want to know how the voice distortion.
I've run some experiments to determine the nature of the distortions,
and I found that on affected kernels, what I'm hearing is the difference
between the left and the right channel of what is playing. So, if I play
a mono sound, I hear nothing at all (or rather, almost nothing). If I
manually mute one of the channels, I hear the sound normally (through
both ears, while on older kernels muting individual channels actually
works). If I invert one of the channels, I hear the sound normally as
well. If I play a stereo sound (for example, a music track), I hear
distortions.
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