note-player-stream

Plays different notes with the Web Audio API based on a stream of input

This module expects to be used with web-midi-note-stream, but accepts any stream which outputs objects that look like the following:

{
	pressed: Boolean, // Whether the button has been pressed/released
	note: Number, // Integer between [0-127] which represents a midi note
	frequency: Number, // The frequency to play the oscillator at (note required for custom nodes)
}

Usage

Install:

npm install --save note-player-stream

Require:

var playerStream = require("note-player-stream");
var player = playerStream({type: "square"});

Example

This example will listen for input from a Launchpad and play sound when a button is pressed

var playerStream = require("note-player-stream");
var noteStream = require("web-midi-note-stream");
var webMidi = require("web-midi");

webMidi("Launchpad")
	.pipe(noteStream())
	.pipe(playerStream());

API

playerStream([options])

Returns an object stream which takes in objects representing device input, and plays sound using the Web Audio API.

Options

| Property | Default | Explanation | |----------|-----------------|-------------------------------------------------------------------------------------| | gain | 0.2 | How loud the output should be | | output | ctx.destination | What node to output to | | node | make oscillator | Function that takes data and returns an AudioNode | | update | no-op | Function that takes data and a node that can be used to update the node on new data | | type | sine | Type of oscillator to create |