# Beatstep Pro octaves set too high
**URL:** https://lookmumnocomputer.discourse.group/t/beatstep-pro-octaves-set-too-high/1959
**Category:** DIY STUFF
**Created:** [October 7, 2020, 1:01pm UTC](https://lookmumnocomputer.discourse.group/t/beatstep-pro-octaves-set-too-high/1959 "2020-10-07T13:01:23Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Aswayze](https://lookmumnocomputer.discourse.group/u/Aswayze)
#### Post date: [October 7, 2020, 1:01pm UTC](https://lookmumnocomputer.discourse.group/t/beatstep-pro-octaves-set-too-high/1959/1 "2020-10-07T13:01:24Z")
Helllooo! So my beatstep won’t play friendly with a computer and it’s octaves are set too high.
C0 is actually C2, etc.
I would like to get down another octave or two and was thinking there may be an easy passive way to do this.
If I ran the pitch cv through a circuit like this (different resorted values though), would it drop everything down an octave?
I’m away from my breadboard for a couple of days, and am itching to find out if this could work!
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### Author:  [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)
#### Post date: [October 7, 2020, 1:28pm UTC](https://lookmumnocomputer.discourse.group/t/beatstep-pro-octaves-set-too-high/1959/2 "2020-10-07T13:28:58Z")
I wrote up this whole long reply and then realized I hadn’t realized your entire premise was mistaken…
It’s not that the Beatstep is wrong, it’s that no one agrees what’s right. 1V/Oct is standard, and most manufacturers agree 0V should be C, but there’s complete disagreement on which C. See [https://learningmodular.com/matching-octaves-in-your-modular/](https://learningmodular.com/matching-octaves-in-your-modular/).
Anyway, you don’t want to cut the CV in half. That would turn a 1V/Oct CV into 0.5V/Oct! You want to subtract a volt off the CV.
Doing that in a precise way is best done with an op amp circuit. Take a look at this:
> **[Octave Switcher](https://www.elby-designs.com/webtek/synth-modules/octave/octave.htm)**
(Of course many VCOs, including LMNC’s, have an octave switch built in.)
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### Author:  [@fredrik](https://lookmumnocomputer.discourse.group/u/fredrik)
#### Post date: [October 7, 2020, 2:38pm UTC](https://lookmumnocomputer.discourse.group/t/beatstep-pro-octaves-set-too-high/1959/3 "2020-10-07T14:38:23Z")
> Doing that in a precise way is best done with an op amp circuit.
Or you can try configuring the Beatstep via the control center thing:
(haven’t tested it, but afaict from the manual the 0V settings lets you tweak the CV levels)
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### Author:  [@Caustic](https://lookmumnocomputer.discourse.group/u/Caustic)
#### Post date: [October 7, 2020, 5:56pm UTC](https://lookmumnocomputer.discourse.group/t/beatstep-pro-octaves-set-too-high/1959/4 "2020-10-07T17:56:13Z")
I was about to say this. Arturia lets you configure the voltages straight in their hardware, so thats the easy way id wager.
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### Author:  [@stmllr](https://lookmumnocomputer.discourse.group/u/stmllr)
#### Post date: [October 7, 2020, 9:23pm UTC](https://lookmumnocomputer.discourse.group/t/beatstep-pro-octaves-set-too-high/1959/5 "2020-10-07T21:23:15Z")
I confirm this works
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### Author:  [@Aswayze](https://lookmumnocomputer.discourse.group/u/Aswayze)
#### Post date: [October 7, 2020, 10:14pm UTC](https://lookmumnocomputer.discourse.group/t/beatstep-pro-octaves-set-too-high/1959/6 "2020-10-07T22:14:42Z")
@analogoutput Thank you! Of course, I don’t know why I didn’t think of that! Ill build that straight into my VCO.
The simplest thing would have been to swap it in the software as @Caustic and @fredrik mentioned, but the previous owner solder the usb cable straight to the PCB so now the computer wont recognize it (got it very cheap).
Its covered in hot glue, so id rather not risk messing it up.