soundcard / pc clock difference megerment
playing 1kHz tone ... wait 100 seconds
	Device	Tick	Time	PeformanceCounter
	4.003	4.000	4.003	4.005
	9.007	9.000	9.006	9.009
	14.007	14.000	14.006	14.008
	19.007	19.000	19.006	19.008
	24.003	24.000	24.002	24.004
	29.003	29.000	29.001	29.004
	34.007	34.000	34.004	34.008
	39.007	39.000	39.004	39.008
	44.007	44.000	44.004	44.008
	49.007	49.000	49.003	49.008
	54.007	54.000	54.003	54.008
	59.003	59.000	59.000	59.004
	64.007	64.000	64.003	64.008
	69.003	69.000	68.998	69.004
	74.003	74.000	73.997	74.004
	79.007	79.000	79.001	79.008
	84.007	84.000	84.001	84.008
	89.007	89.000	89.000	89.007
	94.003	94.000	93.996	94.003
	99.007	99.000	98.999	99.007
Diff:
	Tick=0, Time=-5, PerformanceCounter=4