SND_DUMMY(4) FreeBSD Kernel Interfaces Manual SND_DUMMY(4)
NAME
snd_dummy - Dummy audio driver
SYNOPSIS
To load the driver at boot time, place the following line in
loader.conf(5):
snd_dummy_load="YES"
DESCRIPTION
The snd_dummy driver implements a virtual testing device, meaning it does
not correspond to a physical sound card. It is intended for testing, so
that test programs do not need to rely on hardware being present in the
machine in order to run.
The driver attaches as a regular PCM device, with two channels (one
playback and one recording), as well as a mixer.
Playback works by discarding all input, and recording by returning
silence (zeros).
SEE ALSO
sound(4), loader.conf(5), loader(8)
AUTHORS
The snd_dummy driver was implemented by Christos Margiolis
<
[email protected]> under sponsorship from the FreeBSD Foundation.
CAVEATS
Because the driver automatically attaches once the module is loaded, it
can only be attached once.
FreeBSD 14.1-RELEASE-p8 July 15, 2024 FreeBSD 14.1-RELEASE-p8