Microsoft DirectX 9.0

Performance Parameters

DirectMusic lets you control many aspects of track behavior by changing parameters during playback, using one of the following SetParam methods:

The IDirectMusicPerformance8::SetGlobalParam method enables you to set values that apply across the entire performance.

The equivalent GetParam and GetGlobalParam methods retrieve current values for a track or the performance.

To have the music respond immediately to a changed parameter, an application can flush messages from the queue by using the IDirectMusicPerformance8::Invalidate method. This method causes all tracks to resend messages from the specified point forward.

See Also