I’ve run into a problem sequencing a Bass Station 2 with the Octatrack arp. In the pattern I start with a 3 note arp, Root note C4 note 2 + 3, note 3 + 5, No probs. Then a change to C4 note 2 + 3, note 3 + 5, note 4 + 10 no probs, then C4 note 2 + 3, note 3 + 5, note 4 + 9, but the fourth note plays a whole note lower, ie.+ 8! I tried with note 2, then note 3 deactivated and same thing happens! I’ve got the pattern on half speed of main tempo. Arp and latch on the BS2 are deactivated. Is this a bug? Has anyone else had this problem?
Are you sure of the notes you want to send ?
Where is the semitone ?
If you’d give the notes names maybe it would be easier to understand your problem.
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Sezare, thanks for the reply
C4, D# 4, F4 and the fourth note is set to trigger A (5), (C4 +9) but instead instead triggers G# (4) -
The previous 4 note arp chord in the pattern - C4, D# 4, F4, A# 5 plays correctly.
Further clarification
When I trigger C4, D# 4, F4, G# 4 it plays correctly
When I trigger C4, D# 4, F4, A# 5 it plays correctly
When I trigger C4, D# 4, F4, A 5, it plays C4, D# 4, F4, G# 4
Ok it’s clearer. Never had such weird behavior.
Can you use a midi monitor such Miditest (PC) to check what you really send with OT?
Same behaviour with same notes and different root note ?
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I would have to install miditest, but as you see above, he root note is the same,
I tried aetting a different root note F3, and the fourth note triggers a semitone lower as it should.
Try to send these notes but with D#4 as root note…
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Did you turn of the scale quantise functionality?
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The same: still getting G# instead of A, Tried setting the A an octave higher, still get G#
I forgot that, I don’t use it, it should be the explanation. 
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Bingo!
If anyone is looking at this thread with the same issue, it’s KEY - OFF in the arp setup
Many thanks Kreis, and Seazare. I really appreciate your help.
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