Distribution: EndeavourOS (Arch Linux based), Arch Linux
PNGTuber Plus Version: v1.3, v.1.2.1
Microphone: Samson G-Track Pro (USB), Fifine A8 (USB)
Audio server: Pipewire v.0.3.83

1) The application stops hearing the microphone after about 3 minutes, and when you change the microphone, it also stops hearing it.
2) Also, when launching BattleBlock Theater from the Steam, the background turns black.

My friend improved the situation as follows:
Moved the line 46 “spectrum = AudioServer.get_bus_effect_instance(1, 1)" to line 84 in createMicrophone()
After patch:
PNGTuber Plus Version v.1.2.1:
 1)  The problem with the microphone not hearing the user is solved
2) After changing microphone device, the app stops hearing it
PNGTuber Plus Version: v1.3:
1)  The application started not hearing the user again after a while, but the time after which this happens has become longer
2) The microphone device's replacement part has started to work (After changing the device, the app starts hearing the microphone again)

Sorry for interfering with your code ♡

I'm having the same mic issue on Xubuntu 22.04.3 using PulseAudio

Okay, so this issue persists in the linux version no matter what I do, but running the steam version through proton seems to fix this problem. I haven't encountered it at all using the steam version. The only downside is that background transparency doesn't work when running the software this way.

PNGTuber Plus Version v.1.2.1 after patch:

The app crashes after about 5 hours of use.
I used a personal PNGtuber.

I have the same issue with the same setup. husky's workaround did help, but as noted in a reply to that, this breaks the ability to switch costumes.

My problem was solved over time with updates from the developer (but I'm not sure)
However, now I'm faced with the fact that PNGTuber plus changes my audio preset on startup to “analog” instead of “professional audio”

same