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soundlab

overtone drawing board

Setting up SuperCollider

Returning to this project after a while, I could not get the internal SuperCollider server to boot with my current system (Debian Linux, OpenJDK 12.0.1, Clojure 1.9.0, Overtone 0.10.6) - it throws an exception. However, I got the external server to boot. Producing sound was a little tricky as I am unfamiliar with JACK but it helped to observe how the SuperCollider IDE configured the JACK connection graph (open scide and qjackctl; start the SC server from within the IDE; play a test sound to make sure it works; look at the qjackctl graph view).

External SC server

I am not sure if this setup is consistent for every system, but this works for me:

  1. Suspend pulseaudio and start JACK server:
pasuspender -- jackd -r -d alsa -r 44100
  1. Start SuperCollider server:
export SC_JACK_DEFAULT_INPUTS="system:capture_1,system:capture_2"
export SC_JACK_DEFAULT_OUTPUTS="system:playback_1,system:playback_2"
scsynth -u 57110 -i 2 -o 2 -m 128000

This post (https://swiki.hfbk-hamburg.de/MusicTechnology/634) helped me figure out how to configure JACK input/outputs automatically (SC_JACK_DEFAULT_[INPUTS|OUTPUTS]).

  1. Start REPL and test sound:
lein repl
> (use overtone.core)
> (connect-external-server)
> (demo (saw 440))

Getting started

In a REPL:

> (use 'soundlab.core)
> (composition)

To stop sound:

(stop)