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DirectMusic & midi. I must SetParam twice before it works!

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well, I wrote a class that loads and plays midi files. I have an Init() function that loads the midi into a segment and I have a Play() function that first downloads the segment and then plays it. In the Init() function I call this: mpSegment->SetParam( GUID_StandardMIDIFile, 0xffffffff, 0, 0, NULL ); Then when I Play() the MIDIFile nothing happens. But if I make a call to SetParam *twice* with the exact same params, the midi file then plays fine. Im confused...

:::: [ Triple Buffer ] ::::

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