noneuclidean

#### Multiplatform (Node.js, SparkAR, MaxMSP (node.script)) module for pure polyrhythmic ("noneuclidean") timing of events

$3

In your terminal, install noneuclidean module and your choice of sound player:

npm install noneuclidean;
npm install node-wav-player;

In your node app:

const track = require('noneuclidean');
const player = require('node-wav-player');

A track takes one parameter, "beatProb", an array of the relative probability (0.0 - 1.0) that a beat count (index + 1) will be chosen.

Define instruments:

class Instrument {
constructor(path) {
this.path = path;
}
play = () => {
hit(path);
}
}

"path" is the relative path to a sound file to play.

"hit" is a function to play the sound:

const hit = (path) => {
player.play({
path: path,
}).then(() => {
// console.log('play start.');
}).catch((error) => {
console.error(error);
});
}

• Create an array of instrument parameters:

// instrument data aray of arrays = name, path
instParams = ['./snd/808_Kick_x3.m4a', "./snd/808_Closed_HH.m4a"]

• Create arrays of Instrument & Track objects:

const trackCount = 2;
var instruments = [];
var tracks = [];
for (i = 0; i < trackCount; i++) {
let newInstrument = new Instrument(instParams[i][0]);
instruments.push(newInstrument);
let newTrack = new track.Track([.33, .33, .33]);
tracks.push(newTrack);
}

• Define "beat" to generate pulse, call noneucledean Track.play method, and play instrument:

const beat = () => {
setInterval(() => {
for (j = 0; j < trackCount; j++) {
if (tracks[j].play() == 1) {
hit(instruments[j].path);
};
}
}, 250);
}

Finally, call "beat":

beat();

$3

Open patch "maxHost.maxpat". The node.script object loads maxWrapper.js, which requires noneuclidean.

Turn on audio and metronome. Send beatProb list messages to create tracks, bangs to increment pulse.