synthdef-json-decoder


decoder for SuperCollider Synth Definition File Format

Installation

``
npm install synthdef-json-decoder
`

API

- decode(buffer: ArrayBuffer): Object[]

Example

`rb
SynthDef("sine", { |amp = 0.5, freq = 440|
Out.ar(0, SinOsc.ar(freq, 0, amp) ! 2);
}, variants:(alpha:[amp:0.25,freq:880], beta:[freq:1760]))
`

`js
const fs = require("fs");
const decoder = require("synthdef-json-decoder");

const file = fs.readFileSync("sine.scsyndef");
const buffer = new Uint8Array(file).buffer;
const json = decoder.decode(buffer);

console.log(json);
`

`js
[
{
// the name of the synth definition
"name": "sine",
// constant values
"consts": [ 0 ],
// initial parameter values
"paramValues": [ 0.5, 440 ],
// param indices
// { name: the name of the parameter,
// index: its index in the paramValues,
// length: its length in the paramValues }
"paramIndices": [
{ name: "amp", index: 0, length: 1 },
{ name: "freq", index: 1, length: 1 }
],
// ugen-spec
// [ [
// the name of the SC unit generator class,
// calculation rate (0: Scalar, 1: Control, 2: Audio),
// special index,
// input-spec,
// [ [ index of unit generator, index of unit generator output ]
// or [ -1 for a constant, index of constant ] ]
// output-spec
// [ calculation rate ]
// ] ]
"units": [
[ "Control" , 1, 0, [ ], [ 1, 1 ] ],
[ "SinOsc" , 2, 0, [ [ 0, 1 ], [ -1, 0 ] ], [ 2 ] ],
[ "BinaryOpUGen", 2, 2, [ [ 1, 0 ], [ 0, 0 ] ], [ 2 ] ],
[ "Out" , 2, 0, [ [ -1, 0 ], [ 2, 0 ], [ 2, 0 ] ], [ ] ]
],
// variants
// { key: the name of the variant,
// values: variant initial parameter values }
"variants": [
{ name: "beta", values: [ 0.5 , 1760 ] },
{ name: "alpha", values: [ 0.25, 880 ] }
]
}
]
``

License

MIT