The rawrec package provides a useful command line recorder and might be used to record to a 320kbps mp3 as in:
$ time rawrec -t 3600 | \ -t sw -r 44100 -c 2 - -t wav - | \ sox --alt-preset insane - recording.mp3 lame
The gramofile application is more useful for recording from vinyl LPs, for example. It also supports track splitting and filtering to remove the traditional vinyl `pop’. For editing the sound signal use the graphical audacity application.
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