23 Dec
2006
23 Dec
'06
9:23 a.m.
"Clemens Ladisch" <cladisch(a)fastmail.net> writes:
Mario Lang wrote:
Excuse my ignorance please, but how do I reliably determine
if dmix is the default device? For instance, ogg123, which uses libao,
only offers -o card:N and such, but no -o device:"string", so
I am kind of wondering if libao clients do perhaps always play on a
hw device? I've tried to decipher the configuration in /usr/share/alsa,
but I didn't really come far. dmix is definitely defined there, but
how do I know it is the default?
In any case, so far, playback only works through alsa oss emulation.
native alsa just underuns like hell.
--
CYa,
Mario
I just tried to get sound working on a LinkSys
NSLU2 (ARM) running
Debian Etch using a USB sound card.
What I discovered I find pretty strange, and would like to know some
more details. Apparently, all ALSA native clients don't
manage to play sound click-free, they actually have underruns all the
time. However, if I use OSS (via the snd-pcm-oss module) and set
libao to use the oss driver, I get perfect playback with about
20% CPU use at maxiumum by the user-space app playing/decoding files.
Does the same happen when ALSA clients play to device "hw:0" as
opposed to the default dmix device?