NRPN calculator

This applies to all (rack/player/etc)

Not quite as slick as mwelker version but allows you to calculate and obtain/view the NRPN midi data required to change most parameters on a 0-100%, -12dB to +12dB or 14bit scale.
Also select effect type by name. Could be handy if you wish to enter the midi data into your DAW or for developing coding or projects.

Find the NRPN calculator here:

Kemper NRPN midi values

Be interested to get some feedback on this. I am at the point now where i will either tweak it slightly or just disconitue developing it as there are nicer versions out there.

PS- Moderators- When will we have the option to choose multiple "The Profiler Model referred to in this thread is ... " ?

Quote from schoko

Hi slateboy looks like an awesome tool, i tried also to make an midi app, but want to start from scratch. I had some problems with calculating some parameters to sysex (i think some frequencies and decibel to 128 / 256 steps and back to the frequency -> studio equalizer). Can i take a look at your source code how you have done it (my abandoned first try is here: https://github.com/schoko11/KEKO-…=readme-ov-file) ?

Thanks!

its all done in html and php. i have done other stuff in arduino. i'm a very amateur programmer so my code is not the best. i think what you may be seeking is how to scale ranges, whether thats 0-100%, -12dB to +12dB or some other to get it to the 0 to 16838 14bit value (and then maybe convert to the two midi values to transfer as an NRPN)

You may also benefit from checking out mwelker and his web-to-midi controller. Its an impressive tool and you can find it here-

Thread

Web Midi Controller

Hi folks,

I've seen a couple web/browser midi controllers in the forum, but throwing this one out there as well. I designed it for the KPP, but should work with others. It's good for testing settings, and playing with midi if you don't have a controller - or if you're like me and program your changes in a DAW, it's goo for testing out the settings before committing. It's running on a free node server, so the URL is pretty ugly. I've shortened it:

https://shorturl.at/auGOl

Just plug your KPP USB-B…

mwelker

March 13, 2025 at 2:59 PM

hope that helps?

Quote from nejo_hh

Thank you very much, slateboy! Great work, helpful and convenient.

Suggestions (OS11 though):

Effect Parameter, Volume: CC98 = 6 (not 4!)
Amplifier, Volume: CC99 = 10, CC98 = 3

well spotted. thanks for the corrections/amendments.