Echo Cancellation Demo

[DmitryMyadzelets]

If I've understood correctly, this echo canceller should work on any machin with a mic and speakers. So, I'd be grateful to see a set of instructions which demonstrate how echo occurs without echo cancellation, and how things change when the ec does its job.

For instance, I use GStreamer, and with following command I can definetly here the echo.

gst-launch-1.0 alsasrc device=default ! alsasink device=default

Another way to get echo:

arecord | aplay

How to cancel the echo?

[StuartIanNaylor]

?
Echo is due to having media playing when recording. Like on a laptop the mic signal can become swamped by the music playing through speakers.
This using a filter to remove what was playing from the mic input and seems to work really well.
You have to have a card that has both playback & capture so they are on the same clock it doesn't work with different cards for playback & capture say Pi embedded playback and USB capture.

The instructions on the front page work for me.

[DmitryMyadzelets]

@StuartIanNaylor The "before" and "after" demo would be highly appreciated.

[StuartIanNaylor]

https://community.rhasspy.org/t/budget-10-aec-my-annoying-voice-and-gpu-fft/833

https://community.rhasspy.org/t/respeaker-2-hat-buster-rhasspy-ha-as-service-install-picotts-snips-wakeword/118/31?u=rolyan_trauts