[c-st]

Another synth I find quite fascinating because it is very visual about what it is doing is Helm: https://tytel.org/helm/

It lets you modulate almost every control the synth has, and it certainly helped me to understand how synths work.

[shampto3]

The same developer released a new synth plugin “Vital” last fall, which also has great visuals and modulation.

https://vital.audio/

[smoldesu]

This, a million times. I love Helm, but Vital utterly thrashes it. If you do any sort of music in any capacity, you owe it to yourself to have it in your VST folder.

[Archit3ch]

Vital was also open-sourced recently!

[arvinsim]

It's only flaw is the name since there is a terminal application called helm...

[johnvaluk]

To be fair, Helm the synth predates helm the k8s package manager.

[hangtwenty]

Re: modulating all the things, Bitwig is pretty great (compare to Ableton)