The audio synthesis API that communicates with SuperCollider is operational. You can define a synthesizer, load it and then trigger it and send it control messages to adjust parameters. Here’s a short example of creating and playing a simple synth on the repl.
(use 'overtone.live)
; import the UGen function library
; we do it this way because we need to override a bunch of built-in clojure
; functions, including +, -, *, / and other common functions. Doing it like
; this saves you from having to exclude all this in your namespace definition.
(refer-ugens)
; boot the synth server
(boot)
; here is a random, echoing, ping synth
(defsynth chop-saw [freq 440 depth 5]
(comb-n (* (env-gen (perc 0.1 0.4) (lf-pulse:kr 2))
(rlpf (saw (+ freq (* depth
(lf-saw:kr (lf-pulse:kr 0.1 0.2)))))
freq 0.6))))
; play it
(chop-saw)
; kill the synth instance based on the last returned node id
(kill *1)
; play it with different settings
(chop-saw 440 20)
; and control them on the fly
(chop-saw :ctl :freq 880 :depth 10)
; make some more
(chop-saw :freq 440)
(chop-saw :freq 220)
(chop-saw :freq 110)
; clear all running synths
(reset)
; quit the synth server
(quit)A graph based editor (connecting nodes with edges) is coming to life now. This will allow you to define synthesizers and control patches in a basic graphical programming environment. Here’s a screenshot showing some of the widgets implemented in the first prototype (click to zoom):
Overtone can be used as a library from Clojure code or on the repl, but there is also the beginnings of a standalone application. It currently boots the server and it has a repl that can evaluate code, but it will soon get a text editor and the flow editor.