Is there any way to adjust oscillator pitch besides semitone steps?

I picked up a Prophet Rev2 last week, and I’ve been absolutely obsessed with it ever since. In almost every aspect, it’s exceeded my expectations—and sonically, it’s nothing like what some online reviews call “harsh” or “digital.” It has the sound that I've been dream hearing all these years, and having it is like a dream come true for me.

That said, there’s one thing that’s been bothering me all week: the way oscillator pitch (OSC FREQ) is adjusted.

It’s a love-hate relationship. On one hand, I appreciate the incredibly wide range of the control—it’s unlike anything I’ve seen on other synths. On the other hand, the fact that it only adjusts in semitone steps, combined with the wide range, makes it extremely sensitive. Even the slightest turn of the knob can drastically shift the pitch. I checked the manual but couldn’t find any way to switch to a different adjustment mode.

Yes, you can technically reach any frequency you want using a combination of OSC FREQ and Fine Tune, but this approach feels very different from what I’m used to. My other synth, the Moog Subsequent 37, has a far more intuitive setup: an octave switch, a continuous knob for ±7 semitones, and a fine-tune knob. With that setup, I can dial in the pitch I hear in my head in about five seconds. On the Rev2, however, I have to move the knob very carefully, and I can’t glide through an interval range—it only jumps by semitones. This really breaks my creative flow.

What confuses me most is: if the OSC FREQ knob is only meant to step through semitones, why not make it a stepped encoder like the Value knob? Why use a smooth-turning knob to control discrete pitch values?

Aside from this one issue, I genuinely love everything else about the Rev2. If anyone here knows a way to change how the pitch adjustment works (or if I somehow missed it in the manual), please let me know. If not, I hope someone from the Sequential design team sees this and considers adding a more flexible pitch control mode in a future firmware update—something like what I described on the Moog.

For example: maybe holding down the Shape button could turn the transpose panel on left side of the synth into an octave selector for the oscillator, the OSC FREQ knob could become a continuous ±7 semitone control centered at 12 o’clock, and the Fine Tune knob could stay as is. If something like that were implemented, the Rev2 would be, for me personally, the perfect polyphonic analog synth—with absolutely no compromises in sound design.

Thanks for reading my post!
« Last Edit: March 30, 2025, 10:29:54 AM by Alex Zhang »

Re: Is there any way to adjust oscillator pitch besides semitone steps?
« Reply #1 on: March 31, 2025, 11:51:38 AM »
Most synths I had have been octave selector and then frequency adjustment, but very quickly got used to REV2 approach.
- but you suddenly find you are octaves away on ordinary settings, but got used to it
- I even find it better when doing oscillator sync for one to be in the ballpark

Some synths have a shift button to change a continuous control to go in semitones instead, on frequency or cutoff and similar.
- it could be useful having a shift button and turning knob runs C1, C2, C3 and similar to be in ball park
- then adjust as usuall for the semitones if wanting that, I rarely do unless oscillator sync

Look if setting for knobs, jump, relative or pass-thru works better for you. If jump setting the position of knob immediately would be octaves away probably.

Don't get your hopes up for firmware updates, the 1.2.1 is probably here to stay.
- Check with global button in display what you run on.

REV2 is a masterpiece for sure, love it, had my desktop-16 now 3 years.

Look at CreativeSpirals video on how to use gated sequencer for vintage tuning stuff if wanting that.
https://youtu.be/jB9HG3k3vvQ

I use it a lot with slew to get oscillators sway tiny bit constantly and have all lfo:s free for other stuff.

Re: Is there any way to adjust oscillator pitch besides semitone steps?
« Reply #2 on: March 31, 2025, 03:36:01 PM »
Don't get your hopes up for firmware updates, the 1.2.1 is probably here to stay.
- Check with global button in display what you run on.
Thank you for your reply and sharing valuable information with me! Mine has updated to 1.2.1 already. I'm not sure if Rev2 has reached the end of its life cycle as I don't know if it's a tradition for Sequential to update a synth every 10 years. There is a large number of Rev2 users and potential Rev2 users, so  I hope new firmware update will still be provided to elevate our experiences, just like they did to TAKE5 2.0, which it's indeed a mind blowing update.

I don't actually have a lot of problems to live with this feature, but I personally wish to be able to have an alternative approach to achieve some kind of sounds. I'll definitely check out the video you share, as I've heard a lot about how powerful gated sequencer of Rev2 is.

Re: Is there any way to adjust oscillator pitch besides semitone steps?
« Reply #3 on: April 22, 2025, 12:26:37 PM »
What confuses me most is: if the OSC FREQ knob is only meant to step through semitones, why not make it a stepped encoder like the Value knob? Why use a smooth-turning knob to control discrete pitch values?
Most likely, potentiometers were used rather than encoders to save manufacturing cost.

Fortunately, any parameter can be adjusted with the VALUE knob. In your case: Press and hold SHOW and then turn the OSC 1 FREQ knob. The display shows the current value and as long as SHOW is held the OSC 1 FREQ won't change. Now, release SHOW and turn the value knob to adjust OSC 1 FREQ.

Alternatively, just start by turning OSC 1 FREQ to get it into the right neighborhood. While the pitch is still being displayed, make finer adjustments with VALUE.

I use this method quite frequently when fine tuning many of the parameters.