I attempted to recreate the sound of the Korg Volca Drum using Drambo.

Note: I do not own a Volca Drum so this may be way off, I have modelled it using the signal path diagram found in the manual and online videos of the device.
I’ve tried to make it as intuitive as possible using Drambo modules.

2 oscillators
Selection of sine, saw or noise for each
Selection of envelope, LFO or random pitch mod.
(Mod view switches between parameters for each)
Mixer for oscillator levels.
Parallel modal resonator and comb filter effects

Feel free to use or modify how you wish.