How do I filter OUT unwanted MIDI-messages on patch change?

To filter out unwanted incoming MIDI messages, at the concert level select assignments and mappings and scroll to the bottom of the list. Select unassigned and uncheck "send unassigned MIDI to all channel strips".

For outgoing MIDI, in the channel strip inspector>MIDI input, you can filter some outgoing messages, including CC#11 expression, on a per channel strip basis.

In that case, you can set minmum and maximum levels for each knob, slider, or whatever. Select one of them in edit mode and assign to CC#11. Then in the screen control inspector, assign it to its destination. To the right, map the parameter to the desired minimum and maximum. See screen shot below. I assigned a pedal to expression and mapped it.

The screenshots are a little blurry and I can't see it even after zooming in, but understand the process. What external keyboard do you use? I'll try to look at the MIDI specs and find a solution. No guarantees, but I like MIDI puzzles.

Hi Melleweijters,

I am having exactly the same issue as you describe, MainStage keeps sending out CC11 on patch changes, which provokes issues with hardware synths. Did you came up with a solution to this in the meantime?

Cheers

I can't find a workaround for this problem. In a future version, maybe the MainStage team will put MIDI filter options on the MIDI output tab like the ones in the MIDI input tab in the channel strip inspector.

Thanks for your reply. I tried to filter it out with midi pipe as you did. Didn't know that program and didn't succeed yet. Could explain to me how you set Midipipe up to 1) spy on MainStage midi outputs and then to 2) cancel CC#11, and not transform it to something else ? Thanks for your help.

My last suggestion probably wouldn't be ideal. If you filtered outgoing MIDI CC#11, you wouldn't be able use expression on the external instrument channel strip. You might be able to use the Scripter plugin to block only the first CC#11 message and let all others pass through for that patch. I'm not yet familiar enough with Scripter to do it, but someone else in the community might know how to do it.

Yes, midi scripter is a good idea. Not familiar with it either though, but I should be able to do that. I'll try my way around with it and get back here if I come up with a solution. Cheers.

ok. i came up with a solution that seems to work, using the midi scripter plugin and this simple snippet :

function HandleMIDI(e) {
        if (e instanceof ControlChange && e.number == 11)
        e.trace();
}

it simply monitors CC#11 but does not send it through. i have now an instance of scripter on top of all channel strips where I need to keep CC#11 from being sent to my synth. Working like a charm so far, finally. Peace of mind and back to work 🙂