Is it possible to mute or remove a track?

[ar065]

I've searched the docs and haven't found anything on it. I'm currently using a <List> to keep track of muted tracks/channels

[melanchall]

Do you mean mute during playback? If so, you can create custom playback and ignore events on specified track chunk or channel. Please see example here: #122. So your implementation of TryPlayEvent will be like that:

protected override bool TryPlayEvent(MidiEvent midiEvent, object metadata)
{
    if (mutedTrackChunks.Contains((int)metadata))
        return false;

    OutputDevice?.SendEvent(midiEvent);
    return true;
}

You need install 5.2.1-prerelease7 version or later since provided API is not released yet.

[ar065]

Currently I do:

List<int> IgnoreTracks = new List<int>();

Then inside the playback NoteCallback I do this:

if (IgnoreTracks.Contains(rawNoteData.Channel)) return null;

Would your method be more efficient? Or which would be faster? That's what I'm currently trying to decide on.

[melanchall]

In your question you've mentioned tracks. If you need to mute MIDI events by track chunk index, you should use my method. But if you just need to mute channels, then your approach is the best way, so stick with it.