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How to use amixer to increase PCM volume?
amixer -c 1 set PCM 2dB+ will increase the PCM volume of the second card with 2dB. When both playback and capture volumes exist, this is applied to both volumes. amixer -c 2 cset iface=MIXER,name=’Line Playback Volume”,index=1 40%
How to set card control in amixer ( 1 )?
Sets the card control contents. The identifier has these components: iface, name, index, device, subdevice, numid. The next argument specifies the value of control. Shows the card control contents. The identifier has same syntax as for the cset command. Select the card number to control.
What are the optional modifiers in amixer ( 1 )?
The optional modifiers can be put as extra parameters to specify the stream direction or channels to apply. The modifiers playback and capture specify the stream, and the modifiers front, rear, center, woofer are used to specify channels to be changed.
Can you play PCM with numid = 3?
So PCM playback route with numid=3 is missing, and 1+2 say Headphone instead of PCM, that is the normal as far as I can tell from the interweb. I can still play things with aplay and omxplayer (I’m not sure if it is mono or stereo). But some other things fails, which I thought might be because of this.
How to use amixer in Ubuntu 14.04?
I’m running 14.04, and I was told I could use amixer to control volume via the command line. For example, to mute sound you would use So I did some man reading and found out I needed to replace Master with the name of my laptop’s mixer control. Typing amixer returns: Once again.
How to use amixer on an ALSA soundcard?
Use the mapped volume for evaluating the percentage representation like alsamixer, to be more natural for human ear. will set the second soundcard’s left line input volume to 80% and right line input to 40%, unmute it, and select it as a source for capture (recording). will set the master volume of the second card to -20dB.