How to record system audio on Raspberry pi?

Question

I’m trying to figure out how to record the system audio from raspbian. I want to record audio from either the OS or a specific program... like recording an audio stream... if it possible? I tried searching but everything is talking about using a USB sound card. Any help is appreciated.

Answer 1

I want to record audio from either the OS or a specific program.

You can store all speaker output by this procedure.

1. Install these packages:

   sudo apt-get install pulseaudio-utils lame
   

2. Search for your speakers and tap into your speaker's monitor stream:

   pacmd list-sinks | grep -e 'name:' -e 'index' -e 'Speakers'
   

   Find the monitor stream by:

   pacmd list-sources | grep -e 'name:' -e 'index'
   

   

3. Play anything you want to record and run this command with your alsa monitor output:

   parec -d alsa_output.pci-0000_00_1f.3.analog-stereo.monitor | lame -r -V0 - OutputAudio.mp3
   

4. Hit ctrl+c to stop recording. Play the OutputAudio.mp3.

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