how to have /dev/audio on ubuntu?

Mel Wilson mwilson-Ja3L+HSX0kI at public.gmane.org
Thu Sep 20 19:30:56 UTC 2012


On Thu, 2012-09-20 at 22:39 +0400, Zbigniew Koziol wrote:
> I am so much confused by reading web, and I swear I never understood how 
> sound works (except of the times of DOS).
> 
> My program reports:
> 
> [siggen] No such file or directory : /dev/audio
> 
> "siggen" is the name of the program I want to use, but the error 
> message, I guess, is not related to the program itself.
> 
> So, how can I make siggen not reporting that silly error message but 
> just working right away?
> 
> My Ubuntu version is one of the latest ones.

I'm not fully up on this, but on Ubuntu 10.04 here:

mwilson at tecumseth3:~$ grep audio /var/log/*
grep: /var/log/btmp: Permission denied
grep: /var/log/btmp.1.gz: Permission denied
grep: /var/log/gdm: Permission denied
/var/log/messages:Sep 16 11:29:21 tecumseth3 pulseaudio[1877]:
ratelimit.c: 904 events suppressed
/var/log/udev:KERNEL[1348150067.223573]
add      /devices/pci0000:00/0000:00:1b.0/sound/card0/audio (sound)
/var/log/udev:DEVPATH=/devices/pci0000:00/0000:00:1b.0/sound/card0/audio
/var/log/udev:DEVNAME=audio
/var/log/udev:UDEV  [1348150067.257181]
add      /devices/pci0000:00/0000:00:1b.0/sound/card0/audio (sound)
/var/log/udev:DEVPATH=/devices/pci0000:00/0000:00:1b.0/sound/card0/audio
/var/log/udev:DEVNAME=/dev/audio
/var/log/user.log:Sep 16 11:29:21 tecumseth3 pulseaudio[1877]:
ratelimit.c: 904 events suppressed


so it looks like udev is finding an on-motherboard sound device and
setting it up as /dev/audio with appropriate drivers.  Seems to be
referring to /lib/udev/rules.d/78-sound-card.rules to do this.

	Good Hunting,		Mel.






> 
> zb.
> http://nanolab.gu-unpk.ru/
> 
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