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From: Pieter de Goeje <pieter@degoeje.nl>
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To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: sound programming
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Op 18-9-2012 10:15, Wojciech Puchar schreef:
> where can i find up to day beginner howto of programming sound (C 
> language) in FreeBSD?
>
> particularly how to record/process/mix/play sound realtime - i mean 
> having low delays.

Check out 4front's OSS documentation
http://manuals.opensound.com/developer/

In particular (recording and playback with low latency):
http://manuals.opensound.com/developer/fulldup.c.htm

Barring implementation differences, this should all apply to FreeBSD.
To get really low delays you should probably adjust the hw.snd.latency 
sysctls.

Regards,
Pieter de Goeje