u-he

zoikkis · Post by **zoikkis** » Mon Dec 21, 2009 4:45 pm

Let's say I load patch Berlin Wallflower and draw one long note in Logic 8. Then I press play and put metronome on. First everything seems to be ok but slowly the sequence is set behind from the metronome and in about 40 bars as much as 1/4th note.

Same thing happens in Logic and Renoise, is this normal or what could cause this? I have tried to change the sample rate between 44 and 96 khz, no help. Also tried this with both internal sound card and with Apogee Duet, same problem.

zoikkis · Post by **zoikkis** » Mon Dec 21, 2009 5:07 pm

Ok I tried it with PC/Renoise too, problem is there too...

bmrzycki · Post by **bmrzycki** » Mon Dec 21, 2009 5:08 pm

That particular preset has a tiny bit of swing (1.33). Try setting it to zero to see if this helps you.

I tried this in Reaper 3.15, HS Berlin Wallflower, adjusted swing to 0.00. I looped C4 over 2 bars for 40+ iterations. No drift.

zoikkis · Post by **zoikkis** » Mon Dec 21, 2009 5:18 pm

Yeah that did it! Thanks bmrzycki for your kind help.

sinzero · Post by **sinzero** » Mon Dec 21, 2009 5:28 pm

but why does swing cause a drift?

shouldn't it swing at a constant rate?

zoikkis · Post by **zoikkis** » Mon Dec 21, 2009 5:48 pm

I also wonder why swing causes this drifting, I probably would've never figured it out by myself. Shouldn't swing just affect the overall groove and not the actual seq sync to tempo?

Echo Voodoo · Post by **Echo Voodoo** » Mon Dec 21, 2009 6:06 pm

The arp sync issue has been mentioned before (most recent I can find is in this thread). Whatever the problem is, it appears to be tricky, since Urs knows about it but hasn't been able to pin it down yet.

bmrzycki · Post by **bmrzycki** » Mon Dec 21, 2009 6:08 pm

From what I can tell it is swinging at a constant rate. In this specific case that the time it takes to swing forward and then back is several bars.

Try listening to the loop for 80+ loops. You'll start hearing the loop slowly coming back in line.

I think the reason Howard added this small amount of swing was to emulate a bit of vintage gear drift.

EDIT: Regarding the drift bug, it might be fixed: see KVR Thread

Urs · Post by **Urs** » Mon Dec 21, 2009 8:01 pm

Well, it's possible that fixing the old swing/arp bug causes long term timing problems. It's a really weird formula that I hardly understand myself after the years.

40 bars without a retrigger is definately a lot. That's problematic in any case.

On the other hand, as SSE2 is now a prerequisite, maybe I switch everything to double precision and gain an hour of tight play.

We'll see.

Thank dog there's still something left to be done

u-he

KVR Audio

Zebra 2.5 Arp/Seq doesn't stay in SYNC with the host sequencer