2026-01-09 overtone | Clojure Slack Archive

overtone

plexus 2026-01-09T11:31:21.708209Z

Did some poking around with SuperSonic (Sam Aaron's supercollider to wasm fork). I couldn't get shadow-cljs to load it from node_modules, but if you simply download the zip and unpack it, you can do something like this:

(ns net.arnebrasseur.lab
  (:require
   [kitchen-async.promise :as p]))

(def supersonic (atom nil))

(p/let [^js ss (js* "import('/supersonic/supersonic.js')")
        SuperSonic (.-SuperSonic ss)]
  (reset! supersonic (SuperSonic.))
  (.addEventListener
   (js/document.querySelector "button") "click"
   #(p/do
      ;; Must be called from some kind of user interaction like a click event
      (.init ^js @supersonic)
      (.loadSynthDefs ^js @supersonic #js ["sonic-pi-prophet"]))))

(comment
  (.send @supersonic
         "/s_new", "sonic-pi-prophet", -1, 0, 0, "note", 28, "release", 8, "cutoff", 70))

❤️ 6

plexus 2026-01-12T12:27:31.482579Z

yeah, it just bundles a bunch of scsynth files and loads them via http. You can drop your own compiled synths in there just the same.

plexus 2026-01-12T12:32:15.611359Z

I did find that this js* import trick didn't work with advanced compilation with shadow-cljs, but you can use :target :esm, and then (:require [shadow.esm :refer [dynamic-import]]) and (dynamic-import "/supersonic/supersonic.js")

plexus 2026-01-12T12:33:21.384059Z

I do want to poke at supersonic a bit, it uses import.meta.url, which prevents shadow/closure from transpiling it, I think it may not be necessary and with small tweaks we could load it like a regular js library that gets included in the build. The wasm would still be loaded separately

diego.videco 2026-01-12T19:19:48.681099Z

That’s all awesome! Thanks a lot for spending time with this!

plexus 2026-01-09T11:33:39.329459Z

this opens the door to a clojurescript version (subset?) of overtone... gonna be a boatload of work to make all of that code portable. I guess one would start with the synthdef (de)serialization logic and build up from there.

diego.videco 2026-01-09T17:24:43.934809Z

wow, nice work figuring this out! is it clear how to load other synthdefs (i.e. from compiled files)?

Joakim Verona 2026-01-13T12:49:02.734389Z

im toying with strudel atm, its very convenint. having the same for overtone would be awesome!

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overtone