[bisq-network/bisq] Static noise while running the app (#2867)

[a123b]

As you can just turn it off in the settings, it didn't bother me enough to open a ticket, but I have to agree with @Giszmo here. The file currently used for standby prevention is a pretty weird choice... it has:
- 40 MiB file size, noise with -68.7 dB peak amplitude (and even some tag metadata?!)

In comparison, a mono 8000 Hz 16-bit WAV with 15 seconds of silence has:
- 234 KiB file size, no noise whatsoever

A simple `ffmpeg -i silent.wav silent.ogg` yields an OGG with:
- 28 KiB file size, noise with -71.2 dB peak amplitude


But the noise in the current file is so low I'd guess that the audible noise is rather coming from the audio hardware than the file itself... which would be audible even with the no-noise WAV file...

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