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
amixer set Master muteThe output for me is
amixer: Unable to find simple control 'Master',0 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:
Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off]So naturally, I enter amixer set IEC958 mute but all I get is
Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off]Once again. I've tried sset and some other commands but every single one returns the same text. Also, why is there no "Master" or "Speaker" controls? Is there something I'm doing wrong?
4 Answers
If you want to use amixer to control the volume, this should work in a terminal:
amixer -D pulse sset Master 0%(0% to mute or use any percentage you like)
To reduce/increase the volume, you can add - or + after % (but that doesn't work to increase the sound beyond 100%).
2might be possible you use the wrong card. make sure you use the right card. If you have attached a webcam with mic for example, then it might eat the first slot ;-)
list all cards first:
cat /proc/asound/cardfor me itlooks like:
0 [Webcam ]: USB-Audio - Philips SPC 1030NC Webcam Philips CE Philips SPC 1030NC Webcam at usb-orion-ehci.0-1.2, high speed 1 [Audio ]: USB-Audio - USB Audio USB Audio at usb-orion-ehci.0-1.5.7, full speedthen chose your card. 1st card would be default -c 0, so if you want to chose the 2. card then do:
amixer -c 1 Master +10 I have found 3 useful commands:
amixer -D pulse sset Master 5%-
amixer -D pulse sset Master 5%+
amixer -D pulse sset Master toogle
Other 2 commands:
amixer -D pulse sset Master mute
amixer -D pulse sset Master unmute
amixer set IEC958,0 muteYou have to specify your card as shown in the amixer output. Use "unmute" instead of "mute" to turn the sound back on again.
