BASS_ATTRIB_MIDI_CHANS attribute

The number of MIDI channels in a MIDI stream.

BASS_ChannelSetAttribute(
    HSTREAM handle,
    BASS_ATTRIB_MIDI_CHANS,
    float channels
);

Parameters

handle	The MIDI stream handle.
channels	The number of MIDI channels... 1 (min) - 128 (max). For a MIDI file/sequence stream, this cannot be lower than the number of channels that the stream was created with.

New channels are melodic by default. Any notes playing on a removed channel are immediately stopped.