Custom MIDI foot controller using an ESP32

Hardware
1

I’ve built a custom MIDI foot controller using an ESP32. It displays the song name and changes the screens for each footswitch to represent the song part. Is it possible to send a MIDI command from GP indicating which song number is selected when I select a song in Gig Performer? This would allow me to jump from 1 song to another quickly. My current solution is to have “next” and “prev” song buttons on my controller, but sometimes I want to jump quickly 10 songs ahead. Rather than pressing “next” 10 times it would be awesome if I could just select the song in gig performer and it could send out a midi command indicating which song number I selected. I see there’s a way to send a MIDI command when a song is selected, but does that need to be programmed for every set list created? Is there a generic way to setup Gig Performer so it always sends the same midi command for “Song 1” and “Song 2”, etc?

PXL_20250620_214731582
PXL_20250620_2147315821920×1034 200 KB

2

You may need to use Gig Script for this. There is callback for when a song changes (which provides the selected song index). You can then send out a midi message and use the song index as the PC number or a CC value.

1 Like
3

Thanks, I’ll look into that!

4

Actually I’m not seeing a callback for when a song changes, only for rackspace change. Or is this not the correct place to be looking? List of callbacks — GP Script 3.6.0 documentation

5

That’s a GP 3 manual :slight_smile:
Try this (GP5 manual)

2 Likes
6

Oh whoops! First result when googling “gig performer gig script” didn’t notice I was looking at old docs. Thanks!

7

This worked, thanks for your help @rank13 and @edm11.

In case anyone else is trying to do this here’s how:

  1. Create a MIDI out block in Global Rackspace. Right Click to give it an OSC/GPScript Handle. Mine is “ToPedalBoard”
  2. Create a script: Window → Global Rackspace Script Editor
    Here’s the script that sends a MIDI note on channel 3 velocity 55. The note is the song index
> var ToPedalBoard : MidiOutBlock
> 
> On Song(oldSongIndex : integer, newSongIndex : integer)
>     var note : NoteMessage
>     note = MakeNoteMessageEx(newSongIndex,55,3)
>     SendNowExternal(ToPedalBoard,note)
> 
> End
2 Likes