public void AddDrumMixEvents(MidiEventCollection midi)
{
var drumTrack = midi.GetTrackByName(TrackName.Drums.ToString());
var existingMixEvents = drumTrack.
OfType <TextEvent>().
Where(e => e.AbsoluteTime == 0 && e.MetaEventType == MetaEventType.TextEvent).
Select(e => e.AsDrumMixEvent()).
Where(e => e != null).
ToList();
for (var difficulty = 0; difficulty < 4; difficulty++)
{
if (existingMixEvents.Any(e => e.Difficulty == difficulty))
{
continue;
}
// Try to keep them in order
drumTrack.Insert(difficulty + 1, DrumMixEvent.DefaultFor(difficulty));
}
}
