Consider the following scenario:

• You have a Windows Vista-based computer that has multiple processors, such as a dual-core processor. Or, the computer has a hyperthreading-enabled processor.
• You run a program that uses the waveOutWrite function.

In this scenario, the waveOutWrite function returns the following error message:

MMSYSERR_NODRIVER

The waveOutWrite function continues to return this error message until you exit the program. Additionally, audio playback does not work as expected when you run the program.