pulseaudio and adder stream latency

[lsmithso at hare.demon.co.uk]

Hi:

I'm trying to record headphone output and mic input  simultaneously to
a single file, using pulseaudio streams and the adder plugin.

The problem is that the recording of the sink rapidly lags behind the
source, eventually by several seconds. The result is that the
headphone and mic recording are completely out of sync.

Any idea of what causes this and how to fix it? Here's the pipeline:
 


gst-launch -q -e pulsesrc device=2 ! adder name=mix ! audioconvert ! vorbisenc ! oggmux  ! filesink location=r.ogg pulsesrc device=3 ! mix.


-- 
Les Smithson