BASS_ATTRIB_MIDI_VOICES_ACTIVE attribute

The number of samples currently playing in a MIDI stream.

BASS_ChannelGetAttribute(
    HSTREAM handle,
    BASS_ATTRIB_MIDI_VOICES_ACTIVE,
    float *voices
);

Parameters

handle	The MIDI stream handle.
voices	The number of voices.

This attribute is read-only, so cannot be modified via BASS_ChannelSetAttribute.

BASS_MIDI_StreamGetEvent can be used with the MIDI_EVENT_VOICES event to check how many voices are active in individual MIDI channels.