On Sun, Dec 30, 2012 at 9:46 AM, Fons Adriaensen <fons(a)linuxaudio.org>wrote;wrote:
On Sun, Dec 30, 2012 at 02:22:51PM +0000, Ben Bell
wrote:
Running with a more modest session hovering at
30% normally, pulling the
alsa_in channels (just into jack -- no connections) raises the CPU to
~55%
but there are no xruns.
So it seems that the problem is most likely in the alsa multi plugin. As
an
aside I'm surprised at the extent of resource
usage caused by simply
having
alsa_in running. Normal, or suspicious?
jack_netsource doesn't cause this
sort of load, and tweaking sample rate and the like doesn't seem to
affect
things. A side-effect of it expecting to need to
resample everything?
You could try zita-a2j instead of alsa-in. On my old 2G P4 machine
adding 8 channels that way takes 10% CPU. Sound quality is vastly
better than alsa-in.
it seems as if it may be wise to "replace" alsa_(in|out) with zita-a2j.
what do you think?