KVR Audio

crnbaker · Post by **crnbaker** » Sat Jul 18, 2026 9:25 am

PartialString
Finite-difference time-domain physical modelling string synthesiser

I’ve been working on this on and off since releasing https://github.com/crnbaker/gostringsynth back in 2022 (although for some reason the post seems to have been deleted - maybe the mods getting rid of old software posts). It uses the FDTD method to model a simple, “ideal” string (no stiffness) but let’s you do some silly things like reduce the accuracy for metallic sounds and modulate the position of the pickup at audio rate for AM-like side bands.

A version with a more realistic model is in the pipeline.

Free to download at: https://differentinstruments.com.
KVR page: https://www.kvraudio.com/product/partia ... nstruments

VariKusBrainZ · Post by **VariKusBrainZ** » Sat Jul 18, 2026 2:41 pm

Sounds good, does it allow extreme settings outside of a normal constrained model?

Nug Wrangler · Post by **Nug Wrangler** » Sat Jul 18, 2026 5:03 pm

Thanks for this

crnbaker · Post by **crnbaker** » Sat Jul 18, 2026 10:02 pm

VariKusBrainZ wrote: Sat Jul 18, 2026 2:41 pm Sounds good, does it allow extreme settings outside of a normal constrained model?

Yes, it's not supposed to be realistic. Just a different way of thinking about sound design. Some "unreal" things:

* You can reduce the accuracy of the model (i.e. the number of points by which the string is represented) to introduce dispersion, and therefore inharmonicity. It sounds metallic and bell like.
* You can modulate the position of the pickup up to audio rate, which does some AM type things.

And... that's about it I think

but the sound palette is pretty broad. Check out the video above, I do both.

MillerSam · Post by **MillerSam** » Sun Jul 19, 2026 3:08 am

nice release, any chance to get GUI resizing

it GUI is a bit too small

pough · Post by **pough** » Sun Jul 19, 2026 4:12 am

Aging eyes + aging CPU =

I appreciate it, though. I'll save it for when I get a new computer and new glasses. It might be able to replace some old string modeling synths I used to enjoy that never got 64 bit versions.

crnbaker · Post by **crnbaker** » Sun Jul 19, 2026 7:45 am

Thanks for the feedback! I’ll look into making an option to zoom the gui.

crnbaker · Post by **crnbaker** » Sun Jul 19, 2026 7:47 am

pough wrote: Sun Jul 19, 2026 4:12 am Aging eyes + aging CPU =

Have you tried the overload protection option? Stops you playing strings too long for your CPU to handle. Not ideal though, I appreciate!

You can also set the accuracy to “pitch dependent” and then reduce the accuracy slider a bit. Low notes will then be less accurate (so effectively low-pass filtered and in extreme cases a bit inharmonic) but will be much kinder to your cpu.

My new, free finite-difference time-domain physical modelling string synth