Could anybody confirm?
When the CPU gets too busy, enabling and then disabling PDC
calms down the CPU usage from 70% to 20%. Spikes stop immediately,
at least for a while.
Buffers 512, ASIO guard on, and Normal.
EDIT: this is way simpler and faster than having to go to ASIO
settings and changing buffers, just to reset the spikes on COU usage.