22 Dec
2011
22 Dec
'11
3:49 p.m.
I finally got some spare time to "fix" my system. I installed arch linux
from scratch (3.1 kernel) and the alsa drivers included there work way
better than the ones included in ubuntu studio. The distortion is gone and
the latency is decent (256 samples). Thanks for the input! :)
On Thu, Nov 3, 2011 at 7:33 AM, Rafael Vega <email.rafa(a)gmail.com> wrote:
Thanks for the input Daniel, I'll try this as soon
as I reinstall my OS
(messed up partitions :P)
On Nov 1, 2011, at 5:04 AM, Daniel James wrote:
--
Rafael Vega
email.rafa(a)gmail.com
Hi Rafael,
My laptop is a MacBookPro8,1 with i7 processor,
8GB ram, built-in intel
HDA soundcard
For Intel HDA a tweak is often required to get good performance. See:
http://apps.linuxaudio.org/wiki/intel_hda_realtime_howto
Ignore the kernel recompile part, but note the issue with mixer capture
switches if using jackd in full duplex mode.
Codec: Cirrus Logic CS4206
Try adding these options at the end of /etc/modprobe.d/alsa-base.conf
options snd-hda-intel model=mbp55 position_fix=1 enable=1 index=0
The mbp55 value for CS4206 is found near the end of:
http://www.kernel.org/doc/Documentation/sound/alsa/HD-Audio-Models.txt
Then reboot and see if JACK performance improves. You should be able to
get 64 frames/period x 3 periods/buffer @ 48KHz on this hardware.
Cheers!
Daniel