I've noticed an odd behavior when muteing the audio on tv card devices.
What's strange is that it's the same on dissimilar hardware, using
different interfaces.
On either my Hauppauge WinTV 401 or my STB Desktop TV, if i either mute
the fm tuner by using fmutills "fm off" or, when using the tvmixer
module, use an oss mixer application (gmix, etc) to mute the tv audio
device, only one channel gets muted.
At first it was suggested that this is a problem with v4l applications
doing the wrong thing (fmutils specifically), but since the tvmixer app
does the same thing, I doubt that.
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