SysEx Roland VR09B Drawbars Only Moving in One Direction

Hello, very new to Bome midi translator. Have appreciated all the help I’ve found so far and have been able to program translators for my Roland VR09B to control my Arturia B3 VSTs.

The issue is that the drawbars only seem to be moving in one direction and not responding to downward movement, meaning ultimately they get stuck at 0 and do not make any noise.

Strangely, the drawbar assigned to the master volume seems to work both ways fine. All drawbars are using qq and oo variables. I’ve attached photos/video below.

What do I have to do to get the VST drawbars to see the downward motion? I can see in the log window Bome is receiving up and down on the drawbars, but this just isn’t translating into movement both ways on the VST - is this a rules thing? if so, what needs to be done?

Any help would be greatly appreciated. Thanks

Hi and welcome to the Bome community!

Without seeing the rules of the translators, it is hard to tell what might be happening? Could you post your project file? Or perhaps you can use the templates that I created in this post for the tutorial we did.

Steve Caldwell
Bome Customer Care


Also available for paid consulting services: bome@sniz.biz

Hi Steve,

thanks for getting back to me. So currently there aren’t any rules on any of the translators.

That was also the post that I was using to make my project in the first place! all worked great apart from the drawbars not coming back down

Well the drawbars send a value of 0-8 from the SysEX message and you will need to scal that to 0-127 for the CC message so you need to add these rules to the translators.

// Uncomment the below if you  need to scale
// then input of 0-8 to CC output values of 0-127
qq=qq*127
qq=qq/8

I did this for you in the attached but I didn’t add your master volume which you could do yourself and probably doesn’t need to be scaled.

VR-09-Drawbars-2026-04-09.bmtp (7.6 KB)

Steve Caldwell
Bome Customer Care


Also available for paid consulting services: bome@sniz.biz