Current Level of Microphone Input

Question

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!

score 8 · Accepted Answer · answered Nov 28 '12 at 14:35

8

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.

answered Nov 28 '12 at 14:35

CL.

score 2 · Answer 2 · answered Aug 08 '17 at 22:13

2

Based on the above answer, to get the maximum amplitude:

arecord -qd 1 volt && sox volt -n stat &> volt.d && sed '4q;d' volt.d

answered Aug 08 '17 at 22:13

NVRM

2 Answers2