smflite is a minimal toolkit to handle standard MIDI files (SMF) on Unity.

• Audio visual app: synchronize animations to pre-recorded audio clips.
• Rhythm games: retrieve timing information from song data.

• Playback MIDI songs.
• Retrieve meta-data or SysEx data from SMF.

First of all, load a MIDI file with MidiFileLoader.Load. It returns a MidiFileContainer instance which contains the song data.

MidiFileContainer song = MidiFileLoader.Load (smfAsset.bytes);

And then create MidiTrackSequencer with the song data. You can specify the BPM for playback here.

seq = new MidiTrackSequencer (song.tracks[0], song.division, bpm);

Call the Play method in the sequencer class. It return a set of MidiEvent on the starting point of the song.

foreach (MidiEvent e in seq.Start ()) {
  // Do something with a MidiEvent.
}

Call the Advance method in every frame. You should give a delta-time, and then it returns a set of MidiEvent which occurred between the previous frame and the current frame.

void Update() {
  if (seq.Playing) {
    foreach (MidiEvent e in seq.Advance (Time.deltaTime)) {
      // Do something with a MidiEvent.
    }
  }
}

You can run it until the Playing property becomes false.

For the detailed usage, see an example here.

Copyright (C) 2013 Keijiro Takahashi

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