BASS_ChannelSetAttribute( DWORD handle, BASS_ATTRIB_MIDI_SPEED, float speed );
|handle||The MIDI stream handle.|
|speed||The tempo change... 1.0 = normal, below 1.0 = slower, above 1.0 = faster. The final tempo is the product of this value and the original tempo.|
Changes can be made at any time, but the effect of changes during playback may not be heard instantaneously due to buffering.