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.
