Arduino MIDI filter

[Spikes]

Hello all

As has been noted already, things like the GM Voice respond to all 16 MIDI channels. What is needed is a way to filter out Note on messages on each and every channel.

A rough and ready but working prototype:

https://www.youtube.com/watch?v=4cUwtTOLAfA

All MIDI messages are read, if a Note on is detected, it's checked to see if it should be sent, if the channel is active (indicated by a light on) it's sent, if not (light off) then it's ignored. If you think about it, not passing Note offs will cause stuck notes, program changes could happen anywhere in a track etc, so only Note Ons are checked.

Code not quite ready for human consumption yet, but comments are welcome.

Regards

[Dan Lavin]

This will do that and it's been out there for a couple years. Code is free on the download page. I've built it and verified it works great with GM Voices. I think I also mentioned it on my GM Voice for the 21st Century post.

http://www.midikits.net/midi_chan_filter/midi_channel_filter.htm

[Spikes]

Yes I've seen that but it only passes note on data on one preset channel.
Doesn't pass sysex either so not really what I was after.