[LAT] To much latency

Rafael Vega email.rafa at gmail.com
Thu Nov 3 12:33:02 UTC 2011


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:

> 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



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