[pulseaudio-discuss] Need help to reduce delay with USB, mic using pulseaudio

Pierre-Louis Bossart pierre-louis.bossart at linux.intel.com
Wed Aug 24 10:41:31 PDT 2011

> 3) In the latency reported by module-loopback.c, the second number
> (i.e.
> the internal jitter buffer) dominates, both in USB => same USB and USB
> => onboard audio cases: 63.91+733.32+11.65 ms
> So, for me, it looks like the USB master clock (from which the USB
> audio
> clock is derived) is too unstable WRT the system timer as a reference,
> but this doesn't apply to the "internal audio vs system timer"
> situation.

Nah. It's more a configuration issue. I tried with pactl load-module
module-loopback latency_msec=20 and I get a really low latency. Can you play
with this latency_msec parameter and report the log?

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