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<p class="MsoNormal">I will post the recordings.<br>
<br>
EC<br>
<a href="https://drive.google.com/file/d/13WCq9Bs-cW-cJsGFwU9s6DZ2UNLPXyMU/view?usp=sharing">https://drive.google.com/file/d/13WCq9Bs-cW-cJsGFwU9s6DZ2UNLPXyMU/view?usp=sharing</a></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">No-EC</p>
<p class="MsoNormal"><a href="https://drive.google.com/file/d/1HH5klDS_Y5Lcmsuc2EWsBO517V4dwLV0/view?usp=sharing">https://drive.google.com/file/d/1HH5klDS_Y5Lcmsuc2EWsBO517V4dwLV0/view?usp=sharing</a><br>
<br>
If I run speexdsp AEC with exact same setup but via alsa with pulseaudio removed then the results are quite good.<br>
The speaker is only 12” from the mic and 12” from me and quite loud as wondering what upstairs thinks.<br>
But anyway the results are pretty good.<br>
<br>
EC</p>
<p class="MsoNormal"><a href="https://drive.google.com/file/d/1ohO0YaO3CEwrXWwcj8qDbUpWuQo5sv2T/view?usp=sharing">https://drive.google.com/file/d/1ohO0YaO3CEwrXWwcj8qDbUpWuQo5sv2T/view?usp=sharing</a></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">No-EC</p>
<p class="MsoNormal"><a href="https://drive.google.com/file/d/12qNv6O9o-ttFoWE9tytqXdbAKCkPT6NW/view?usp=sharing">https://drive.google.com/file/d/12qNv6O9o-ttFoWE9tytqXdbAKCkPT6NW/view?usp=sharing</a></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Journalctl is giving the usual but this is a single usb soundcard with single clock for capture/playback.<br>
<br>
May 13 14:14:30 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Doing resync</p>
<p class="MsoNormal"> May 13 14:14:30 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Playback too far ahead (37856), drop</p>
<p class="MsoNormal"> May 13 14:14:49 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Doing resync</p>
<p class="MsoNormal"> May 13 14:14:49 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Playback too far ahead (131103), dro</p>
<p class="MsoNormal"> May 13 14:14:49 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Doing resync</p>
<p class="MsoNormal"> May 13 14:14:49 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Playback too far ahead (75977), drop</p>
<p class="MsoNormal"> May 13 14:14:50 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Playback too far ahead (62480), drop</p>
<p class="MsoNormal"> May 13 14:14:51 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Playback too far ahead (13404), drop</p>
<p class="MsoNormal"> May 13 14:14:52 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Playback too far ahead (10231), drop</p>
<p class="MsoNormal"> May 13 14:14:53 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Playback too far ahead (9131), drop</p>
<p class="MsoNormal"> May 13 14:14:54 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Playback too far ahead (9136), drop</p>
<p class="MsoNormal"> May 13 14:14:55 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Playback too far ahead (9651), drop</p>
<p class="MsoNormal"> May 13 14:14:56 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Playback too far ahead (9915), drop</p>
<p class="MsoNormal"> May 13 14:14:57 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Playback too far ahead (9814), drop</p>
<p class="MsoNormal"> May 13 14:14:58 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Playback too far ahead (10011), drop</p>
<p class="MsoNormal"> May 13 14:15:00 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Playback after capture (-580), drop</p>
<p class="MsoNormal"> May 13 14:15:03 raspberrypi pulseaudio[608]: E: [alsa-source-USB Audio] module-echo-cancel.c: Playback after capture (-158), drop</p>
<p class="MsoNormal"> May 13 14:15:20 raspberrypi pulseaudio[608]: E: [alsa-sink-USB Audio] alsa-sink.c: ALSA woke us up to write new data to the device</p>
<p class="MsoNormal"> May 13 14:15:20 raspberrypi pulseaudio[608]: E: [alsa-sink-USB Audio] alsa-sink.c: Most likely this is a bug in the ALSA driver 's</p>
<p class="MsoNormal"> May 13 14:15:20 raspberrypi pulseaudio[608]: E: [alsa-sink-USB Audio] alsa-sink.c: We were woken up with POLLOUT set -- however a<br>
<br>
</p>
<p class="MsoNormal">I am sure there is something not quite write with the webrtc_audio_processing when it comes to arm Linux maybe even just the Pi which here is a Pi4.<br>
Anyone any idea why the first EC with pulseaudio is so bad whilst even the supposedly weaker speexdsp aec actually makes quite a good job with exactly same hardware and setup?<br>
<br>
Stuart<br>
<br>
</p>
<p class="MsoNormal">Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">
Mail</a> for Windows 10</p>
<p class="MsoNormal"><o:p> </o:p></p>
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