Query regarding webrtcdsp/webrtcechorpbe echo cancellation using sync=false

[Ajit Warrier]

I had a quick question regarding the echo cancellation implementation that
is new in gstreamer 1.10. The test loop:

gst-launch-1.0 autoaudiosrc ! webrtcdsp ! webrtcechoprobe ! autoaudiosink

works as expected.

However if the audio sink as sync=false, this does not work, and I can hear
echo/feedback.

gst-launch-1.0 autoaudiosrc ! webrtcdsp ! webrtcechoprobe ! autoaudiosink
sync=false

Is sync=true required for the echo cancellation algorithm ?

Thanks,
Ajit.
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