KVR Audio

abernathy · Post by **abernathy** » Sun Jul 19, 2026 4:05 pm

I used Claude Code to create a converter for Prophet-5 hardware presets. Works pretty well but not perfectly. A few presets have required some pitch or pulse width settings changes. You can set the Collection and Author names for the converted presets. I don't really know what I'm doing, so I welcome suggestions! This is just an html file that opens in a browser.

Since we're big boys and girls here I went ahead and added the "alpha version" Repro-5 presets to GForce Prophet-5 conversion to this for us to play with. New version attached:

Prophet-5 Converter.html.zip

abernathy · Post by **abernathy** » Sun Jul 19, 2026 4:09 pm

Here are the Prophet-5 OG factory presets I converted. 3 banks including the first bank that is already included with GForce Prophet-5, for comparison.

Prophet 5 Factory Presets.zip

abernathy · Post by **abernathy** » Sun Jul 19, 2026 4:18 pm

Just realized I need to update this converter to deal with stacks and splits... definitely a work in progress! OK, it's now updated. I used it to convert the INHALT-Stack-and-Split-Programs.syx bank on Sequential's site and it seems to work, but I don't have the hardware to compare it.

trusampler · Post by **trusampler** » Mon Jul 20, 2026 1:24 am

Hi,awesome work. where do we find the html file ?

Funkybot's Evil Twin · Mon Jul 20, 2026 1:29 am

Nice! I've spent a lot of time going down that particular rabbit hole with RePro-5, which adds some extra challenges. Looking forward to trying this out!

I've got a ton of measurements and test tools for things like LFO times, envelope times, etc., and have measured just about everything on the hardware, RePro, and GForce for some things. If there's anything I can help out with, let me know!

abernathy · Post by **abernathy** » Mon Jul 20, 2026 1:39 am

trusampler wrote: Mon Jul 20, 2026 1:24 am Hi,awesome work. where do we find the html file ?

Oops. It's in the first post now. I had the wrong file attached!

abernathy · Post by **abernathy** » Mon Jul 20, 2026 1:46 am

Funkybot's Evil Twin wrote: Mon Jul 20, 2026 1:29 am Nice! I've spent a lot of time going down that particular rabbit hole with RePro-5, which adds some extra challenges. Looking forward to trying this out!

I've got a ton of measurements and test tools for things like LFO times, envelope times, etc., and have measured just about everything on the hardware, RePro, and GForce for some things. If there's anything I can help out with, let me know!

Try the converter when you can. You might notice some consistent issues with conversions that I can tell Claude about. Out of the 3 factory banks that I attached in the second post, there were 5 or so presets where I had to turn off pulse width, or change OSC settings to get them in tune, but couldn't find a pattern.

After decent success with this converter, I tried doing a Repro-5 to GForce Prophet-5 converter and it didn't go as well. I'll work on it some more, but I think that conversion is much trickier.

trusampler · Post by **trusampler** » Mon Jul 20, 2026 1:54 am

abernathy wrote: Mon Jul 20, 2026 1:39 am
trusampler wrote: Mon Jul 20, 2026 1:24 am Hi,awesome work. where do we find the html file ?
Oops. It's in the first post now. I had the wrong file attached!

abernathy, Amazing job

abernathy · Post by **abernathy** » Mon Jul 20, 2026 2:05 am

I remember folks saying that GForce probably didn't include a hardware preset import option because it was too difficult with the differences in architecture. And maybe that's what I'm running into where some presets are out of tune, or transposed weirdly. Or maybe we'll narrow down where the problem is. Claude worked awfully hard helping me with this...

abernathy · Post by **abernathy** » Mon Jul 20, 2026 2:14 am

Funkybot's Evil Twin wrote: Mon Jul 20, 2026 1:29 am Nice! I've spent a lot of time going down that particular rabbit hole with RePro-5, which adds some extra challenges. Looking forward to trying this out!

I've got a ton of measurements and test tools for things like LFO times, envelope times, etc., and have measured just about everything on the hardware, RePro, and GForce for some things. If there's anything I can help out with, let me know!

I went ahead and added the rough Repro-5 conversion to this tool. Hopefully I'll upload an improved version of these conversions soon, with everyone's help.

Funkybot's Evil Twin · Mon Jul 20, 2026 2:33 am

I've had Prophet Sysex to RePro-5 conversion going for a while now.

See my thread on the U-he forum for details. I measured against my hardware Prophet and did my best to match it to the software. Was actually about to post a new build that fixes and improves upon a bunch of stuff when I saw this. Mine does a lot of stuff, it doesn't just translate the Sysex to RePro values, it actually translates the measured hardware values to RePro measurements. Example: I measured the filter cutoff frequencies for the various filters and created lookup tables. Did the same for the ADSR's, envelope depth, etc. Pretty much anything you can measure, I've got going in my own. I even do some "smart volume adjustment" and tagging. It's been weeks of self-oscillation test tones, writing measurement scripts, and fine-tuning, then even making some creative choices to try to dial things in better (like I couldn't get the Unisawyer patch to quite match up until I assigned MM3 to Filter Decay, mdoulated by Voice Index, for extra slop).

The thread is here - a new build will be up shortly with a week's worth of improvements:
viewtopic.php?t=631253

Funkybot's Evil Twin · Mon Jul 20, 2026 2:39 am

abernathy wrote: Mon Jul 20, 2026 2:05 am I remember folks saying that GForce probably didn't include a hardware preset import option because it was too difficult with the differences in architecture. And maybe that's what I'm running into where some presets are out of tune, or transposed weirdly. Or maybe we'll narrow down where the problem is. Claude worked awfully hard helping me with this...

The tuning may be this:

The hardware sysex for the Frequency knobs goes up to 120, but the highest note is C4, and I believe that value is 96. So values from 97 to 120 exist in the sysex, but they still play a C4. If your tuning scaling isn't aware of that, it could cause mapping issues with the frequency knobs.

Additional tuning related items: there are pitches like B0 and B0+ (this is how they appear on the hardware panel and SoundTower editor). The + variants have no change to the base pitch at all. They're literally the same base frequency. Don't let Claude assume that they're like half-semitones or something; they're not. There's no difference between B0 and B0+ or E2 and E2+, etc.

The Fine Tune parameter, at least in Soundtower, goes from -60 to +60. But it's not really bipolar. -60 is no fine tuning. +60 is 1 semitone sharp. 0 is about a half-semitone sharp. It's 100% unipolar.

If you account for those 3 things in the sysex conversion to the software, you'll likely fix any tuning issues.

abernathy · Post by **abernathy** » Mon Jul 20, 2026 2:47 am

Funkybot's Evil Twin wrote: Mon Jul 20, 2026 2:39 am
abernathy wrote: Mon Jul 20, 2026 2:05 am I remember folks saying that GForce probably didn't include a hardware preset import option because it was too difficult with the differences in architecture. And maybe that's what I'm running into where some presets are out of tune, or transposed weirdly. Or maybe we'll narrow down where the problem is. Claude worked awfully hard helping me with this...
The tuning may be this:

The hardware sysex for the Frequency knobs goes up to 120, but the highest note is C4, and I believe that value is 96. So values from 97 to 120 exist in the sysex, but they still play a C4. If your tuning scaling isn't aware of that, it could cause mapping issues with the frequency knobs.

Additional tuning related items: there are pitches like B0 and B0+ (this is how they appear on the hardware panel and SoundTower editor). The + variants have no change to the base pitch at all. They're literally the same base frequency. Don't let Claude assume that they're like half-semitones or something; they're not. There's no difference between B0 and B0+ or E2 and E2+, etc.

The Fine Tune parameter, at least in Soundtower, goes from -60 to +60. But it's not really bipolar. -60 is no fine tuning. +60 is 1 semitone sharp. 0 is about a half-semitone sharp. It's 100% unipolar.

If you account for those 3 things in the sysex conversion to the software, you'll likely fix any tuning issues.

Thanks! I will look into all this.

Funkybot's Evil Twin · Mon Jul 20, 2026 3:17 am

Dumb question, and it's late so maybe I'm just at the "try it again in the morning" phase of the evening, but after I convert the patches, then bring them into the GForce\Prophet 5\User Patches\ folder, how do I get them to appear in the browser?

I'm not seeing anything in the plugin that I didn't create myself.

trusampler · Post by **trusampler** » Mon Jul 20, 2026 3:59 am

go to the browser - left side of UI then > you'll see a folder then the word Collection - > right side of that hit the refresh button.

My GForce Prophet-5 preset converter for Prophet-5 rev 4 SysEx presets