1 Nov
2016
1 Nov
'16
5:52 p.m.
On Tue, 1 Nov 2016, Len Ovens wrote:
So what is different between running two cores or
four? Cpu load is higher
with two. That would be a Performance/Ondemand governor difference. However,
the size of the cycle does not make sense with that. nor the idea that the
distortion fades in and out. Speed changes give xrun right at downshift (for
me anyway).
Oh, one other difference. The power suppy can be running harder too to
supply more power for extra cores. look at the temperature when running
two cores or four. The power supply is a switcher and the delta series
audio interfaces are known for not taking great care of power regulation.
See:
http://www.jrigg.co.uk/elec/interface.html
So it is possible power supply ripple at switching frequency is causing
problems. It seems to me the switching frequency in at least some power
supplies changes with power output. Of course how well the caps in the PS
filter ripple is affected by power use as well.
--
Len Ovens
www.ovenwerks.net