[pulseaudio-discuss] drain latency with echo-cancel

[Alexander E. Patrakov]

30.09.2014 19:35, Heero Yui wrote:
> Hello
>
> I have write a simple echo suppressor inside the echo-cancel module (it
> is based on "null" version).
> When I activated it, I also open input and output channels, the module
> work correctly.
> I launch it with (same with null):
> pacmd load-module module-echo-cancel aec_method=null
> source_master=alsa_input.0.input-microphones adjust_time=1
> pacmd set-default-source alsa_input.0.input-microphones.echo-cancel
> pacmd set-default-sink alsa_output.0.output-speakers.echo-cancel
>
> The problem: When I open an other output, at the flush request, it take
> like 1 or 2 second more time as when I have not activate the echo
> canceller (work with a paplay)
>
> And I did not understand why!

I also don't understand why. However, please note that this bug is not 
specific to module-echo-cancel. It can also be reproduced with 
module-virtual-sink that deliberately does absolutely no processing and 
just serves as a template for new virtual sinks.

-- 
Alexander E. Patrakov