How can I get the current audio input level of a microphone via a shell command under Ubuntu 12.04 LTS?
I checked out amixer to set the volume but could not find a way to get the audio input level at the time of the shell call.
Thank you in advance!
To get the level of the input signal, you have to actually record from the input device.
Use the -d 1 parameter for arecord to get a short file.
To read the level of the data in that file, use something like sox recordedfile.wav -n stat.