Squeaking noise randomly appearing in recording

[Trebor]

@kozikowski

there’s a ~5kHz tone on the left channel and a ~15kHz [harmonic] on the right …

Correct, but they’re very low level you could go a long time before you even notice them. Neither of those is the loud buzzing noise in the complaint.

If I crank up the volume I can hear the ~5kHz noise : it’s similar to FM-radio interference …