na_record(1) on Linux
The text e7caae9b92be, as Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
record waveform from audio device
Flags it lists
-
-audiodevice -
-h -
-o -
-oswap -
-otype -
-time