This program listens for sound. If it detects any, it starts recording
automatically and also automatically stops when things become silent again.
Listener requires portaudio.
In order to use this, a few steps need to be completed first:
1. Run setlistener (as an ordinary user), and use the
cursor keys on your keybord to move the "|" left and right until
<silence> appears in place of <SOUND!>. Make a note of the "Current
detection level", and modify the detect_level value in
/etc/listener.conf to match.
2. To start, run listener -f (to prevent it forking to the background.
Omit -f if you wish to fork). Output will be saved in the current
directory as an ogg file by default.
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