This is exploiting the way to preview parameter locks ordinarily … you press a trig with various locks and tap the Note which is lit, this auditions a lock without running the sequencer or reprogramming the step (except vel)
When you do this on the A4 the assigned Note will illuminate, if you tap this, nothing changes and you preview … The A4 always has to have an assigned note (locked) … the lit note is the lock, it’s different on AR
On the AR it doesn’t have to have a locked note, but if you go into chromatic after locking a step, even to Note 0 (default), then press the step, you’ll see the assigned note illuminate on the pad, so pressing the same note does an audition … or you can just press the Lit track pad (assuming no note lock set) to audition your locks
The difference with doing it with external midi is that you’re swapping out the internal key/pad role … i 'd forgotten about this on the AR as the pad doesn’t light by default (and only if in chromatic) … but on the A4 it’s indeed a fun way to have a preset machine, even just record parameter locks without notes and hold the trig before playing in via the mini keys (no need for external MIDI) or an OT / ext device
iirc it didn’t work with soundlocks, but it’s kinda cool to have broadly related ‘snapshots’ lined up on the trigs at the expense of a hand … it would be really powerful on the AK
can’t wait to see what it feels like on the AR, bit harder to jump between tracks/octaves though … good shout 