[pulseaudio-discuss] Setting latency of module-loopback

pl bossart bossart.nospam at gmail.com
Tue Sep 29 11:15:21 PDT 2009

>> pactl load-module module-loopback
>> source=alsa_input.usb-TerraTec_PHASE_26_USB_24_96rec__11001-00.analog-stereo
>> sink=alsa_output.usb-TerraTec_PHASE_26_USB_16_48__11001-00.analog-surround-41
>> latency_msec=1
>> fails.
> Fails? Please elaborate? What's the log output PA generates when you
> do this? Something like this should work, though 1ms is probably a bit
> too low.

Why would you need a 1ms latency setting? You are using USB which
packetizes samples, such a low-latency if difficult is not impossible
to reach. Try with 5ms or more.
Also your input and output don't seem to have the same frequency and
word depth, you really want to remove any kind of
resampling/reformatting for an echo functionality.
- Pierre

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