Re: [alsa-devel] [PATCH 1/3] ASoC: cs4270: fix Master Capture Switch polarity

Daniel Mack wrote:

The control modifies the MUTE register, hence the polarity must be inverted.

I have a question. In alsamixer, the capture switch looks either like this:

------

< Master >

or like this:

L R CAPTUR

< Master >

What exactly does this mean? Which one is supposed to mean "muted"? And how come even though this switch is a SOC_DOUBLE, I cannot control the left and right channel independently with the < and > keys, and the "M" key doesn't toggle it either.