I got a AKAI DPS24 recorder sync'ed with mine 4K but I tried the "start sampling via midi note trigger" with os1.51 to see how it worked 4 basic audio phrases. Ya can trigger sample recordin' with a midi note on a selected channel. What I did is create an empty drum program with all pads zone 1 set to ONE SHOT and put it in the multi on midi channel 16B, set a seq track out INT-B channel 16, insert a midi note (Pad1) where I wanna record audio. In Record I selected Midi Note on ch 16B, arm sampling and play the sequence. The 4K started recordin' when the inserted midi note played, and at the end of recordin' I selected ADD PGM and hit Pad 1. I played back the seq and yeah, the "audio" played in sync with the seq!
I tried the same thing but without insertin' the midi note in advance, just put the seq in record (TC OFF!!!) with the 4K Record "waiting for midi note" and hit a pad to start recordin' a sample and record the midi note at the same time on-the-fly. Worked the same.
So it works but I wouldn't track a lot like dat. Now I bet AKAI's gonna work on it to make it like "integrated samplin'" with some kinda automatic thang.
Sure, it ain't gonna compete with mine DPS24 for trackin' but what's cool is there's no audio tracks limit (polyphony up to 64), it's 24bit, and ya can use the filters, envelopes, LFOs to modulate the "audio" like other samples. Somethin' to play with!