Just did a quick test, haven’t played around with it for quite some time so…
The way it works on my Analog Keys is, when you sequence from another sequencer, you can place trigless trigs and lock parameters. While you hold such a trigless trig, the p-lock will be held temporarily, as long as you press down the trig button.
The p-locks will only be played when you press down on a trig, they’re ignored for incoming midi notes.
Let’s say I have a trigless trig that locks cutoff to 42 and another one that locks cutoff to 98.
As long as I press the trig with cutoff=42, the cutoff will be locked at 42. Of course I can build whole sets with 64 ‘scenes’ per track, p-locking multiple parameters.
You mean p-locks on a midi track on the Octatrack?