24 Sep
2009
24 Sep
'09
5:55 a.m.
Ismael Valladolid Torres wrote:
I am running the attached .asoundrc. Works lovely for
dmixing multiple
ALSA applications using the same soundcard.
What I am not being able to do is adding an OSS application to the
equation.
As OSS is not in fact OSS but an OSS emulation that uses ALSA, I
though that the same rules applied to a demixed ALSA application would
apply to an OSS application.
ALSA plugins are implemented in userspace, while the OSS interface is
a kernel driver interface and therefore is implemented in the kernel.
To get sound card sharing with application that use the OSS interface,
you can:
- use a sound card with hardware mixing (VIA AC'97 controllers,
Sound Blaser Live, and some other obsolete chips); or
- use a wrapper that tries to redirect OSS interface calls to a
userspace emulator (aoss, but it doesn't always work); or
- use a kernel driver that redirects OSS calls to userspace (requires
kernel 2.6.31 and OSSP, which currently works only with PulseAudio
and not dmix).
Best regards,
Clemens