Red Hat Bugzilla – Bug 863197
Sound card outputs some sound while the VOLUME is set at ZERO
Last modified: 2012-10-04 14:01:59 EDT
Setting volume @ zero doesn't work correctly, as the sound card still outputs some sound. On the other side, muting works ok...
SOLUTION - Upon setting volume @ zero, two things should happen:
~ the sound card should be silent;
~ the mute flag for the respective chanel should be set system-wide.
$ cat /proc/asound/cards 0
[Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xfe8f4000 irq 45
$ yum list installed *phonon* *alsa*
Mute & volume are two different things. Some hardware does not mute the signal path when the volume register is set to the minimum. Usually, the HDA hardware can have -48dB .. 0dB signal ranges. ALSA copies this.