The update time, expressed in milliseconds, of the DirectSound buffer used for song playback.
The supported range for this property, whose default value is 100, is between 5 and 100: higher or lower values will be automatically cut to the nearest supported value.
Decreasing the update time allows using a smaller DirectSound buffer set through the BufferLength property and also allows a better granularity in managing MIDI events but, obviously, will require a bit more CPU.
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