caffeinecranked

I've been trying to figure how to have different midi instrument for each colour I have - RGB

and this is linked to each one of - r, g, b

but I can only use one instrument at a time. If I firstly set r to piano , then g to flute and lastly b to harp. only the last one that I set will sound (in this case harp)and the others will not make any sound. I can't figure out why this is happening? I want all three types of instruments to make sound.

Hello there,
I've been trying to figure how to have different midi instrument for each colour I have - RGB

and this is linked to each one of - r, g, b
but I can only use one instrument at a time. If I firstly set r to piano , then g to flute and lastly b to harp. only the last one that I set will sound (in this case harp)and the others will not make any sound. I can't figure out why this is happening? I want all three types of instruments to make sound.

Midi instrument stays the same for all values