Zebra arpeggiator problem, sometimes the position jumps at random

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Hi guys,

I just noticed a peculiar thing on my system: from time to time, the Zebra arpeggiator suddenly jumps out of sequence. I haven't used the arp in a while, but today I loaded one of my own arp patches, and noticed this immediately.

By the process of elimination, I came up with a very simple patch which makes the problem manifest on my system: http://lunarladder.kuutikkaat.net/arptest.h2p

This patch should play a simple swinging eight step pattern, but when I let it play, it occasionally jumps to a seemingly random position in the sequence. There is some filter automation going on (using the ArpMod) just to add some tone variation which helps spotting the sequence jump, but the behavior is the same even without the modulation.

The culprit seems to be the Swing Generator. When I have it zeroed, the arp sequence keeps playing normally. When I have it set this way, random jumps start to happen.

Anyone fancy trying this test patch and see if they can reproduce the behavior? If I keep a single note down for, say, ten cycles of the arp pattern, during that time I almost always get some jumping with this basic patch.

I have tested this with different project tempos (starting with a moderate 100 BPM), and jumps happen both in Live and Reaper.

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I can't find that section in your patch file, but check your note tempos, or gate length, and see if the tempo is set very high on certain notes and low on others.
If so it might be just going really fast over those parts, that it seems like it's skipping notes.
I'll try to load it up tomorrow and see...hittin the sack now.

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Thanks for checking this out :). All the note/gate durations are at the default value. Also, the skipping happens occasionally, not consistently.

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What version of Zebra do you have? There used to be problems with the arp and swing but they should be fixed...

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Maybe try a re-install of Zebra, but check your daws sync options too.
What daw are you using?
Maybe try it in Savi-host, then see if it does it there too.

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It's the latest version of Zebra, 2.5.2. I reinstalled it with no effect.

Like mentioned, the test patch skips both in Live and Reaper. Now I also tested it in Renoise, and it skips occasionally at random intervals as well.

Project isn't running, I'm just keeping a note down, and skips happen. However, now checking in SAVIHost using identical device and buffer settings, controlling with the same MIDI controller, trying it at the same tempo, and it does NOT skip :o

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