At Tue, 12 Feb 2008 19:24:35 +0100, Matej Laitl wrote: > > > > So there are now 3 vol controls that affect both speakers and headphones: > > > * Master (which appeared somewhere between 2.6.24 and .25-rc1), when set > > > to zero, the sound is still audible in speakers and headphones > > > > This must be the behavior of the codec chip... Did "Front" volume 0 > > mute in the earlier version? If not, it actually doesn't mute with > > the lowest volume. Use the master switch to mute. > > > > Anyway, attach the alsa-info.sh output at the moment Master volume is > > zero. > > No, setting Master and/or Front channel to 0% did not mute audio in any > version I used. > > I'm now listening to music with Master=0% and Front=0%, the sound is at well > audible volume. Pastebin for this configuraion is here: > http://pastebin.ca/901459 Thanks. The amp values in the codec are indeed set to zero, so this is the minimal volume level, but the codec chip apparently doesn't mute the sound. > However I don't consider it a problem, it's mutable by PCM and HP/Speaker > switches. Funny thing is that resulting volume of those 3 setting is equal: > * Master=0, Front=0 > * Master=100%, Front=0 > * Master=0, Front=100% > But when both set to let's say 50, changing one of these audibly affects > resulting volume. It's because the master volume is implemented virtually to bind several mixer volumes together. The codec chip has no corresponding functionality. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
