TempoChange
virtual void TempoChange(int32 beatsPerMinute, uint32 time = B_NOW);
virtual void TempoChange(int32 beatsPerMinute, uint32 time = B_NOW);
virtual void TempoChange(int32 beatsPerMinute, bigtime_t time);
fMidiObject->TempoChange(beatsPerMinute, MAKE_TIME(time));
virtual void TempoChange(int32 beatsPerMinute, bigtime_t time);
virtual void TempoChange(int32 beatsPerMinute, bigtime_t time);
void TempoChange(int32, uint32);
TempoChange(60000000/tempo, time);