is there some nice trick to make a QTimer trigger at 30 Hz? This interval
can't be expressed properly in milliseconds (1000/30 = 33.333333...)
My use case is for Linux only so I'd be happy with some Linux-specific way
of triggering a signal at 30 Hz too. It won't have to be very precise for
each trigger as long as the average frequency is 30 Hz.
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