11 Nov
2006
11 Nov
'06
8:48 a.m.
But the most intriguing part of the whole story: Not
only did the noise
get louder at a lower latency, it also seemed to precisely double its
frequency when running at halve the number of frames. I even tried to
measure the frequency of the noise. As far as I remember, when running
jack for instance at 44100Hz, periodsize 32, the noise was at exactly
44100/32 = 1378Hz!
Is an interrupt fired at each period? If so the cpu will use more power
(or woken if it was asleep); a small power 'surge' which can of course
have an influence on any analog hardware near by.
daniel