Sclang Startup File

Once the class library is finished compiling the interpreter looks for a file at Platform.userConfigDir +/+ "startup.scd" and if such a file exists, executes any code within it (this happens within Main: -startup). By creating a file in this location you can make user specific customizations.

Linux

~/.config/SuperCollider/startup.scd, according to the xdg base directory specification

macOS

~/Library/Application Support/SuperCollider/startup.scd

Windows

C:\\SuperCollider\\startup.scd (or similar, depending on the location of the SuperCollider installation)

A common example would be to alter the options of the local and internal Servers:// placing the following code in the file will cause these modifications to be made // at startup (see also: ServerOptions) Server.local.options.numOutputBusChannels = 4; // change number of input and output channels Server.local.options.numInputBusChannels = 4; Server.internal.options.numOutputBusChannels = 4; Server.internal.options.numInputBusChannels = 4; Server.local.options.device = "Built-in Audio"; // use a specific soundcard Server.local.options.device = "MOTU Traveler"; Server.local.options.device = "TASCAM US-122"; Server.local.options.device = "Jack Router"; Server.local.options.device = nil; // use the system default soundcard Server.local.options.blockSize = 128; // increase block size (default is 64) Server.internal.options.blockSize = 128; Server.local.options.sampleRate = 96000; // increase sampling rate (if your hardware supports it) Server.internal.options.sampleRate = 96000; Server.internal.options.sampleRate = nil; // use the currently selected samplerate of the soundcard // change the standard archive path to a custom one: Archive.archiveDir = "~/scwork".standardizePath; // hook up jack ports to audio channels "SC_JACK_DEFAULT_INPUTS".setenv("system"); "SC_JACK_DEFAULT_OUTPUTS".setenv("system");

Naturally the file must contain only valid SC expressions.