Oh, I didn't realize that pulse was built upon Alsa. I pulled up alsamixer and found an "auto-mute" option that was binary but listed as a fader on the display. I've disabled it; maybe that'll help.
>From what I've skimmed, it looks like this is to account for, say, a headphone jack being plugged in. I rarely do this (almost always Bluetooth), so switching off this detection is low-risk. Bluetooth might not trigger the switch, but I can always just switch off the main speakers. Thanks for the lead! I'll send an update if/when this solves the issue. Thanks! -Chris On Sat, Dec 19, 2020 at 1:20 PM Matt Feifarek <[email protected]> wrote: > I'm not following everything that you're writing (including the file you > mentioned... which I've never messed with, but I find on my system > as /usr/share/pulseaudio/alsa-mixer/paths/analog-output.conf.common) > > I think, though, that the file you mention might have to do with the alsa > mixer labels in the ui of the console "alsamixer" program more than the > lower level wiring, but I'm not sure. There are lots of dark arts in the > alsa. Personally, I wouldn't mess with that stuff. > > When the speakers drop out, is there anything in your logs? You can check > with: > sudo journalctl -u pulseaudio.service > > Are you certain that the software is muting, and it's not just some kind > of dropout? > > The system can't see what kind of speakers you have, since they're hooked > up via analog line out. I doubt that impedance is an issue, but I'm not > very familiar with the analog side of things. > > If you're just using line out, PA should be fine, and you shouldn't have > to worry about detecting, auto-detecting, or the like. Playing analog out > through onboard sound is pretty normal, you shouldn't be having any > trouble... but see what's in your logs. > > > > > On Sat, Dec 19, 2020 at 1:43 PM Chris Mayes <[email protected]> wrote: > >> Hi, everybody! >> >> It takes me back to have subscribed via Mailman to an email distribution >> list. I'm generally able to solve my issues via Googling, but this one's >> proven tricky. >> >> I recently bought a pair of KRK Classic 5 >> <https://www.krkmusic.com/Classic> speakers to replace a pair of M-Audio >> Studiophile AV 40 <https://m-audio.com/products/view/studiophile-av-40> >> speakers that had developed a rapid popping noise in the internal >> amplifier. The new speakers sound fantastic, but they have an odd >> spontaneous muting issue, at least as configured. >> >> The issue is that the speakers seem to become muted (first one, then the >> other, usually L->R) after some time of playing without any issues. My >> provisional solution is to crank the volume past 100%, which un-mutes them >> (though at an unpleasantly loud volume). This clears up the issue, though >> it usually happens again a few minutes later once I've brought the volume >> back to a reasonable level. >> >> Based on my Googling, I tried modifying analog-output.conf.common to >> "ignore" volume. Here's the PCM block: >> >> [Element PCM] >> switch = on >> volume = ignore >> volume-limit = 2.0 >> override-map.1 = all >> override-map.2 = all-left,all-right >> >> Sadly, this didn't seem to make any difference. What else might I try? >> >> I have a passing familiarity with audio concepts, and one difference that >> I noted is that the new speakers have about half of the impedance of the >> old pair (which never had this problem). Do sound cards use impedance to >> detect the presence of a device? It's plugged into line-out (lime green) >> on an Asus Xonar SE <https://www.asus.com/us/Sound-Cards/Xonar-SE/> (the >> motherboard (Asus PRIME Z390-A) >> <https://www.asus.com/us/Motherboards/PRIME-Z390-A/> had the same issue). >> >> Also, the audio is fed to each speaker separately rather than being fed >> to a single speaker and bridged to the left via speaker cable. Maybe >> that's a factor? >> >> The brute-force thing would be to just mark the line-out port as "always >> on" and to skip attempts to detect whether there's a device connected. Can >> PulseAudio do this? More elegant solutions are also warmly welcomed. >> >> Thanks, >> >> -Chris Mayes >> >> _______________________________________________ >> pulseaudio-discuss mailing list >> [email protected] >> https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss >> > > > _______________________________________________ > pulseaudio-discuss mailing list > [email protected] > https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss >
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