That would make Analog Lab a new instrument, which is interesting in itself.
You could also key a sequencer like the KEYSTEP and program different keys and have it play automatically. Instead of saving a melody to disk, you'd save it to the keystep controller instead. Keystep has 8 different steps each with up to 64 sub steps with up to (I believe) 10 keys per step.
All you need do is create a CONCERT, create a song and save each preset you want into that song.
Then use the keystep to play back step 1, stop, select the next preset, switch the keystep to step 2 then play it etc.
having a sequencer is great for things like this.