pdqm.us (Pretty Damn Quick Music) is a Javascript library for creating browser-based music applications. No plugins required. No server required.
It's currently in a larval state, so please keep your expectations low, but do expect the API to change. Many things are incomplete and likely broken, but that shouldn't prevent you from having some fun with it.
The name is a nod to PDQ Bach. Umm… like … uh … because JS stands for both Javascript and Johann Sebastian. Get it?
The "Q" refers to the quickness of development, not performance. On the contrary, performance may be very low.
<!DOCTYPE html>
<html>
<head>
<title>hello, world</title>
<script type="text/javascript" src="pdqmus.min.js"></script>
<script type="text/javascript">
<!--
function helloWorld()
{
//middle c, with a duration of 1 second
var notes = [new pdqmus.Note(0, 1, 60)];
//create and play MIDI
var midi = new pdqmus.Midi();
midi.addTrack(notes);
midi.play();
//create and play audio
var audioSequence = new pdqmus.AudioSequence(notes);
audioSequence.play();
//draw a piano roll
var pianoRoll = new pdqmus.PianoRoll(notes);
pianoRoll.draw();
}
-->
</script>
</head>
<body onload="helloWorld();">
</body>
</html>
//middle c, d, e with a duration of a 1/4 second, varying velocities
var notes = [new pdqmus.Note(0.00, 0.25, 60, 20),
new pdqmus.Note(0.25, 0.25, 62, 50),
new pdqmus.Note(0.50, 0.50, 64, 102)];
//create and play MIDI
var midi = new pdqmus.Midi();
midi.addTrack(notes);
midi.play();
//create and play audio using a sawtooth wave and envelope shaping
var audioSequence = new pdqmus.AudioSequence(notes, pdqmus.Wave.OSC_SAWTOOTH,
pdqmus.Envelope.DEFAULT_ENVELOPE);
audioSequence.play();
//draw and playback a piano roll, at a larger x scale
var pianoRoll = new pdqmus.PianoRoll(notes, 50);
pianoRoll.draw();
pianoRoll.play();
//draw wave form
audioSequence.drawWaveform();
//create a 60 BPM looping sequencer containing the MIDI and audio
var sounds = [MidiSound.createFromUrl(midi.getDataUrl()),
pdqmus.Sample.createFromUrl(audioSequence.getDataUrl())];
sequencer = new pdqmus.Sequencer(sounds, 60);
sequencer.draw();
sequencer.play();
Geoff Chirgwin
October 2010
Brooklyn, New York
Serious props to these guys for their work on this kind of stuff: