How to capture audio with FreeBSD?

Victor Sudakov vas at
Wed Dec 13 14:16:41 UTC 2017

Onno K. wrote:
> > Since when is it not possible to record with 
> > "cat /dev/dsp > file.wav" like in old hardcore Unixes?
> I have tried this, but the resulting file.wav is only 0 bytes after
> several seconds. So this does not appear to work either. Control-T
> reveals the process is stuck in 'pcmrdv' state. 

So I wonder when it got broken.
> I am also curious how it works with multiple input devices; does BSD
> know what device to point to when accessing /dev/dsp?

AFAIK /dev/dsp is the default device according to sysctl
hw.snd.default_unit, but you can always use /dev/dsp0, /dev/dsp1 etc.

Victor Sudakov,  VAS4-RIPE, VAS47-RIPN

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