Synthmata Volca FM UserScript: Create Random Patches

We often use our Volca FM synth to create sounds and soundtracks for creative projects.

To help assist with sound design, we often utilize the Synthmata Volca FM tool, which is a free online patch editor for Volca FM + DX7 created by oscillatorsink.

And for us, sometimes we just want a completely random patch. To facilitate this, we created a simple UserScript that generates a new, random patch when you click the New Patch button:

// ==UserScript==
// @name Randomize Inputs for Synthmata Volca FM
// @namespace https://synthmata.com/volca-fm/
// @version 0.2
// @description Randomizes the values of certain inputs on a webpage
// @author asimpleart.com
// @match *://synthmata.com/volca-fm/
// @grant none
// ==/UserScript==

function setRandomValues() {
    let inputs = document.getElementsByClassName("randomizerParameter");
    for (let i = 0; i < inputs.length; i++) {
      let min = 10;
      let max = 79;
      inputs[i].value = Math.floor(Math.random() * (max - min + 1)) + min;
    }
  }

//Attach this event to the random_newpatch button
  document.getElementById("random_newpatch").addEventListener("click", setRandomValues);

//Add a key binding, press 1 to generate a new patch
document.addEventListener('keydown', (event) => {
  if (event.key === '1') {
      random_newpatch.click();
  }
});

We hope others may find this little hack useful. Just load up the script in your favorite UserScript extension (we use TamperMonkey) and you’re all set.