Oh well. I have pulseaudio 9 installed, but this AGC issue, at least on my laptop is actually worse on Google Hangouts on Chrome at least (webrtc echo cancellation with no additional options). I had to set microphone boost to zero in the /usr/share/pulseaudio/alsa-mixer/paths/analog-input-dock-mic.conf to make it work. Skype web seems to be ok (on Chrome). Other applications seem to work ok, probably they do not try to crank the boost as hard a Hangout does? Actually so far only Hangouts created issues with echo-cancel. On Thu, May 12, 2016 at 6:52 AM, Arun Raghavan <arun at arunraghavan.net> wrote: > On Wed, 11 May 2016, at 06:22 PM, Laszlo KERTESZ wrote: > > Back with more data. > > I used this option since then, but it turns out that even if Pulseaudio > > doesnt do it,some other apps will still abuse the gain adjustments. > > > > For example i just finished a Google Hangout session (working from my > > home > > desktop) and with "aec_args="analog_gain_control=0\ > > digital_gain_control=0"" - the mic boost (element "Rear Mic Boost") was > > going back to 53 (mid level) causing loud noise when there was silence on > > my side (used headphones with microphone). > > After i set "volume = zero" > > in /usr/share/pulseaudio/alsa-mixer/paths/analog-input-rear-mic.conf, > > "[Element Rear Mic Boost]" section and restarted Pulseaudio, AGC > > adjustments were still made by Chrome, but only within the "Capture" > > control and nobody complained anymore. > > Indeed, it might be interesting to explore an option to disable using > boost controls via UI. At least for me, that's not something I see > myself immediately having the time for. > > > So Hangouts does this, and it seems Chrome has AGC built in for "plain" > > Webrtc too with no option to disable (i at least couldnt find one). I > > tested Jitsi Meet (Webrtc MUC server, locally deployed) and Chrome uses > > AGC > > boost adjustments with the same Pulseaudio setup. > > FWIW, with the upcoming PA 9.0, things may get better with built-in AGC. > > On Firefox, I see a config option to disable AGC, haven't tested if it > does. > > > Skype on the other hand always worked just fine with echo-cancel - either > > doesn't do AGC on its own or does it better (this point isnt that > > important > > now since it will likely stop working for audio/video in the immediate > > future and the browser version will replace it with Webrtc sometimes, > > hopefully before it, returning us to the previous point). Thinking about > > it, desktop apps in general are echo-cancel-friendly, even the > > java-powered > > Jitsi desktop client. > > > > It seems that in cases like this the "aec_args" are insufficient and some > > option should be provided to disable the gain adjustments server-wide > > since > > the editing of the config files are overwritten on Pulseaudio update. > > > > Also note the fact that some sound cards (like most? USB headsets) that > > don't have variable mic boost options are immune to this issue. I have > > one > > USB headset wit mic (actually tried multiple models, all with the same > > results) at work and they work just fine with echo-cancel regardless of > > Pulseaudio's settings. > > We currently don't have the ability to do that. We might get this at > some point as part of ongoing efforts to enable sandboxing. > > -- Arun > _______________________________________________ > pulseaudio-discuss mailing list > pulseaudio-discuss at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20160712/93bf2cd5/attachment.html>
