On Mon, July 1, 2013 10:00 pm, Jeremy Jongepier wrote:
On 07/01/2013 01:50 PM, Patrick Shirkey wrote:
This reminded me that if the audio device is
communicating over the usb
bus it should perform better if the sample rate is divisible by the
period
size.
So if you use 48000 try a period size of -p48 or -p96, etc...
Another possible assist is documented here:
http://alsa.opensrc.org/Usb-audio#Tuning_USB_devices_for_minimal_latencies
http://lists.linuxaudio.org/pipermail/linux-audio-user/2010-January/066765.…
IIUC the potential issues with period sizes with non powers of two are at
the application level. JACK is agnostic about it.
Anyway it's a little spooky that you get better performance with -p64 than
-p128 even in playback only mode.
--
Patrick Shirkey
Boost Hardware Ltd