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live-beatbox
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.DS_Store vendored
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README.textile
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h1. "Beatbox beta":http://github.com/rfwatson/live-beatbox
!http://rfwatson.github.com/images/beatbox.png!
Experimental drum machine which uses vocalization to select synthetic drum hits which best match beat-boxed sound.
Currently uses a combination of MFCC, SpectralCentroid and ZeroCrossing measurements to analyze and match the timbre of the sounds.
In super-alpha-beta state! It may or may not work on your setup.
h2. Requirements
* "SuperCollider":http://supercollider.sourceforge.net
* Some sort of external microphone and audio interface. I use an Edirol FA101 when building this. I haven't got it working well with the Mac's internal sound
* OSX - unless you want to make the GUI stuff cross-platform.
h2. Keyboard shortcuts
* @F1@
Record mode
* @F2@
Preview recorded sound
* @F3@
Jamming mode
* @Space@
Start/stop sequencer
* @Return@
Add hit to seq (while playing)
* @Backsp.@
Remove hit (while playing)
* @Up/Down@
Select channel
* @Left/Rt@
Crossfader control
h2. TODO
* Add analysis of amplitude envelope, only uses timbral analysis at the moment which while quite good it needs amp.env. comparison to be really intuitive
* Add ability to scan and add samples via GUI, from any location
* Improve doc
* Lots more...
h2. Contact me
Via "Github":http://github.com/rfwatson
h2. Licence
bq. *Released under the GNU General Public License.*
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA

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classes/RFWGens.sc
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AverageOutput : UGen {
*ar {
arg in, trig=0.0, mul=1.0, add=0.0;
^this.multiNew('audio', in, trig).madd(mul, add);
}
*kr {
arg in, trig=0.0, mul=1.0, add=0.0;
^this.multiNew('control', in, trig).madd(mul, add);
}
}

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classes/beat.sc
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Beat {
classvar <maxFrames;
var <signal, <nframes, <server, sigbuf, <sample, sampbuf, <path, <features, fftbuf, bus, <nearest, <nearestPath;
*initClass {
maxFrames = 44100; // 1 second of audio, which is more than enough.
}
*newFromSignal { |signal, server, donefunc|
^super.new.initFromSignal(signal, server, donefunc);
}
*newFromPath { |path, server, donefunc|
^super.new.initFromPath(path, server, donefunc);
}
initFromSignal { |aSignal, aServer, donefunc|
signal = aSignal;
nframes = signal.size;
server = aServer;
// we always pass in a mono signal so no need to check here
sigbuf = Buffer.alloc(server, nframes, 1);
sigbuf.loadCollection(signal, action: {
donefunc.(this)
});
}
initFromPath { |aPath, aServer, donefunc|
var sndfile, rawsignal;
path = aPath;
server = aServer;
sndfile = SoundFile.openRead(path);
if(sndfile.numFrames > maxFrames) {
Error("Sound file too large.").throw;
} {
rawsignal = Signal.newClear(sndfile.numFrames * sndfile.numChannels);
sndfile.readData(rawsignal);
if(sndfile.numChannels == 1) {
signal = rawsignal;
} {
signal = rawsignal.clump(sndfile.numChannels).flop[0]; // channel 0
};
sigbuf = Buffer.loadCollection(server, signal, 1, action: {
donefunc.(this)
});
};
}
play { |xfade=0.0, mul=1.0|
var synth;
// why isnt doneAction working for me?
synth = Synth(\beatboxplayer, [\bufnum1, sigbuf, \bufnum2, sampbuf, \crossfade, xfade, \mul, mul]);
SystemClock.sched(3.0, { synth.free });
}
analyse { |donefunc|
var duration, synth;
duration = sigbuf.numFrames / server.sampleRate;
bus = Bus.control(server, 22); // 20 MFCCs, 1 Spectral Centroid, 1 ZCR
fftbuf = Buffer.alloc(server, 1024, 1);
server.makeBundle(1.0) {
synth = Synth(\beatboxanalyzer, [\bufnum, sigbuf, \fftbuf, fftbuf, \cbus1, bus.index, \cbus2, bus.index + 20, \cbus3, bus.index + 21]);
};
server.makeBundle(1.0 + duration, {
bus.getn(22) { |theFeatures|
features = theFeatures;
donefunc.(this);
};
});
// 2 seconds later, free the synth, fft-buffer and the control bus.
SystemClock.sched(3.0 + duration) {
synth.free;
fftbuf.free;
bus.free;
};
}
nearest_{ |path|
var sndfile, rawsignal, len;
nearestPath = path;
sndfile = SoundFile.openRead(path);
rawsignal = Signal.newClear(sndfile.numFrames * sndfile.numChannels);
sndfile.readData(rawsignal);
sample = rawsignal.clump(2).flop[0];
sampbuf = Buffer.readChannel(server, path, channels: [0], action: { |buf|
sampbuf = buf;
});
}
}

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classes/box.sc
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BeatBox {
var <>basepath;
var w, <layout, <scope, <server, beats, nchannels, seq, data, recbutton;
var onsetListener, statusText, thresholdText, lagText, scope, <lowerStatus;
var fftbuf, recbuf, synth, isListening, isRecording, isJamming, recStart;
var jambutton;
*new { |basepath|
^super.new.init(basepath);
}
init { |aBasePath|
basepath = (aBasePath ? "/l/cm2/coursework/task3") ++ "/";
w = SCWindow("Beatbox Beta 1", Rect(200, 700, 520, 558), resizable: false);
// keyboard shorts
w.view.keyDownAction_{ |...args|
var shift = args[2];
var code = args.last;
code.switch(
36, { // enter
seq.setCurrentHit;
},
13, { // backspace
seq.clearCurrentHit;
},
49, {
// move to seq
seq.mainbutton.value_((seq.mainbutton.value + 1) % 2).doAction;
},
122, {
if(recbutton.enabled) {
recbutton.value_((recbutton.value + 1) % 2).doAction;
}
},
120, {
this.preview;
},
99, {
if(jambutton.enabled) {
jambutton.value_((jambutton.value + 1) % 2).doAction;
}
},
123, {
// move to seq
if(seq.xfadeval > 0.0) {
seq.xfadeslid.value_(seq.xfadeval - 0.1).doAction;
}
},
124, {
// move to seq
if(seq.xfadeval < 1.0) {
seq.xfadeslid.value_(seq.xfadeval + 0.1).doAction;
}
},
126, { // move to seq
seq.currentChannel = (seq.currentChannel - 1) % seq.numChannels;
seq.selects[seq.currentChannel].value_(1).doAction;
},
125, { // move to seq
seq.currentChannel = (seq.currentChannel + 1) % seq.numChannels;
seq.selects[seq.currentChannel].value_(1).doAction;
}
)
};
layout = FlowLayout(w.view.bounds);
w.view.decorator = layout;
nchannels = 8;
server = Server.local;
server.doWhenBooted {
recbuf = Buffer.alloc(server, server.sampleRate);
fftbuf = Buffer.alloc(server, 512);
};
isListening = false;
isRecording = false;
isJamming = false;
beats = Array.newClear(nchannels);
File.use(basepath ++ "data.sc", "r") { |file|
data = file.readAllString.interpret;
};
this.initDisplay;
}
initDisplay {
recbutton = SCButton(w, Rect(5, 5, 100, 25))
.states_([
[ "Record (F1)", Color.black, Color.green ],
[ "Stop (F1)", Color.white, Color.red ],
])
.action_{ |button| this.switch(button) }
.keyDownAction_{ nil };
SCButton(w, Rect(5, 5, 100, 25))
.states_([
[ "Preview (F2)", Color.black, Color.green ],
])
.action_{ |button| this.preview(button) }
.keyDownAction_{ nil };
jambutton = SCButton(w, Rect(5, 5, 100, 25))
.states_([
[ "Jam (F3)", Color.black, Color.green ],
[ "Stop (F1)", Color.white, Color.red ],
])
.action_{ |button| this.jam(button.value) }
.keyDownAction_{ nil };
layout.nextLine;
layout.nextLine;
SCStaticText(w, Rect(5, 5, 200, 25))
.string_("Threshold")
.font_(Font("Helvetica-Bold", 12));
SCStaticText(w, Rect(200, 5, 30, 25))
.string_("Lag")
.font_(Font("Helvetica-Bold", 12));
layout.nextLine;
SCSlider(w, Rect(5, 5, 100, 25))
.step_(0.1)
.value_(0.3)
.action_{ |slider|
var value = slider.value.clip(0.1, 1.0);
synth.set(\threshold, value);
thresholdText.string_(value.asString);
}
.keyDownAction_{ nil };
thresholdText = SCStaticText(w, Rect(5, 5, 95, 25))
.string_("0.3");
SCSlider(w, Rect(200, 5, 100, 25))
.step_(0.05)
.value_(0.1)
.action_{ |slider|
var value = slider.value.clip(0.1, 1.0);
synth.set(\lag, value);
lagText.string_(value.asString);
}
.keyDownAction_{ nil };
lagText = SCStaticText(w, Rect(5, 5, 20, 25))
.string_("0.1");
layout.nextLine;
statusText = SCStaticText(w, Rect(5, 5, 510, 25))
.background_(Color.grey);
layout.nextLine;
scope = SCUserView(w, Rect(5, 5, 510, 150))
.relativeOrigin_(true)
.background_(Color.black)
.drawFunc_({ this.drawWaveform });
layout.nextLine;
lowerStatus = SCStaticText(w, Rect(5, 5, 510, 25))
.background_(Color.grey);
layout.nextLine;
seq = Sequencer(w, Rect(5, 5, 510, 300), server, beats, this);
w.onClose = { scope.free };
w.front;
}
switch { |button|
if(button.value == 1) {
jambutton.enabled = false;
this.listen;
} {
this.silenceDetected;
this.ignore;
jambutton.enabled = true;
}
}
jam { |value| // 0 is on, 1 is off: relates to SCButton value
if(value == 1) {
recbutton.enabled = false;
isJamming = true;
if(seq.playing.not) {
seq.play
};
this.listen(amp: 0.0);
} {
isJamming = false;
recbutton.enabled = true;
jambutton.value = 0;
this.ignore;
}
}
preview {
seq.previewCurrentChannel;
}
onsetDetected {
Post << "Onset!" << $\n;
if(isJamming) {
{
seq.setCurrentHit;
}.defer;
} {
if(isRecording.not) {
isRecording = true;
synth.set(\t_resetRecord, 1);
recStart = SystemClock.seconds;
{ statusText.background_(Color.red).stringColor_(Color.white).background_(Color.red).string_("RECORDING") }.defer;
}
}
}
silenceDetected {
var dursamps, sndfile, signal, beat;
Post << "Silence!" << $\n;
if(isRecording) {
synth.run(false);
{
statusText.background_(Color.green).stringColor_(Color.black).string_("Analysing...");
}.defer;
dursamps = ((SystemClock.seconds - recStart) * server.sampleRate).asInteger;
recbuf.loadToFloatArray(0, dursamps) { |floatdata|
// check received from server OK - sometimes fails
if(floatdata.isEmpty.not) {
signal = Signal.newFrom(floatdata);
signal.normalize;
beats[seq.currentChannel] = Beat.newFromSignal(signal, server);
beats[seq.currentChannel].analyse { |beat|
this.findNearest(beat);
{
// allow new recording to begin only after completely finsihed
scope.refresh;
isRecording = false;
statusText.background_(Color.grey).stringColor_(Color.black).string_("");
this.updateLowerStatus;
recbutton.value_(0).doAction;
}.defer;
}
}
}
}
}
listen { |amp=1.0|
var msg, action;
if(isListening.not) { // start listening to input
synth = Synth(\beatboxlistener, [\out, 0, \in, 0, \fftbuf, fftbuf, \recbuf, recbuf, \amp, amp]);
onsetListener = OSCresponderNode(nil, '/tr') { |time, responder, msg|
action = msg[3];
action.asInteger.switch(
1, { this.onsetDetected },
2, { this.silenceDetected }
);
}.add;
statusText.background_(Color.grey).stringColor_(Color.black).string_("Waiting for input...");
isListening = true;
}
}
ignore {
if(isListening) {
var wasRecording = isRecording;
this.silenceDetected;
synth.free;
onsetListener.remove;
if(wasRecording) {
statusText.background_(Color.green).stringColor_(Color.black).string_("Analysing...");
} {
statusText.background_(Color.grey).stringColor_(Color.black).string_("");
};
isListening = false;
}
}
// TODO move to Beat.sc
findNearest { |beat|
var p, total;
var nearest = 10e10;
var neighbour;
data.getPairs.clump(2).do { |pair|
var fname, features;
# fname, features = pair;
total = 0.0;
features.size.do { |i|
p = (beat.features[i] - features[i]).squared;
total = total + p;
};
if(total < nearest) {
neighbour = fname;
nearest = total;
};
};
if(neighbour.isNil) { // FIX sometimes a strange bug causes a lot of nan's to be produced
"There was an error analysing this sound. Try another".postln;
} {
beat.nearest = neighbour;
}
}
refresh {
scope.refresh
}
updateLowerStatus {
var beat = seq.beats[seq.currentChannel];
beat !? {
beat.nearestPath !? {
lowerStatus.string_(beat.nearestPath.basename);
^this;
}
};
lowerStatus.string_("");
}
drawWaveform {
// why is SCSoundFileView so frustrating?
var sig, maximums, x2, y1, y2, p1, p2;
var beat = beats[seq.currentChannel];
beat !? {
p1 = 0 @ 75;
if(beat.sample.notNil) {
sig = (beat.sample * (seq.xfadeval)) +.s (beat.signal * (1 - seq.xfadeval));
} {
sig = beat.signal;
};
maximums = sig.clump(sig.size / 510).collect{ |window|
var posmax, negmax;
posmax = window.maxItem;
negmax = window.minItem;
if(posmax.abs > negmax.abs)
{ posmax } { negmax }
};
Pen.use {
Color(0.3, 1, 0.3).set;
maximums.do { |max, x1|
p2 = x1 @ (75 - (75 * max));
Pen.moveTo(p1);
Pen.lineTo(p2);
Pen.stroke;
p1 = p2;
}
}
}
}
}

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classes/sequencer.sc
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Sequencer {
var w, view, channels, buttons, <buttonvals, <selects, indicators, beatbox, routine, tempoBox, startedTime;
var <xfadeslid, <xfadeval, <>currentChannel, <beats, server, <mainbutton, <playing;
*new { |w, bounds, server, beats, beatbox, nchannels=8|
^super.new.init(w, bounds, server, beats, beatbox, nchannels);
}
init { |aWindow, bounds, aServer, someBeats, aBeatBox, nchannels|
w = aWindow;
channels = 0.0 ! 16 ! nchannels;
indicators = Array.newClear(16);
playing = false;
beats = someBeats;
server = aServer;
beatbox = aBeatBox;
buttons = List[] ! nchannels; // the buttons
buttonvals = List[] ! nchannels; // mirror image of their values: so I can reach them without {}.defer
selects = List[];
currentChannel = 0;
xfadeval = 0.0;
this.initDisplay(bounds);
this.initRoutine;
}
initRoutine {
routine = Routine {
var n = 0, hit, mul;
inf.do {
hit = n % 16;
indicators.do { |light, col|
if(col == hit) {
{ light.value = 1 }.defer(0.2)
} {
{ light.value = 0 }.defer(0.2)
}
};
server.bind {
channels.size.do { |channel|
if(buttonvals[channel][hit] > 0) {
buttonvals[channel][hit].switch(
1, { mul = 0.3 },
2, { mul = 0.7 },
3, { mul = 1.0 }
);
beats[channel].play(xfadeval, mul)
}
}
};
n = n + 1;
(((60 / tempoBox.value)) / 4).wait
}
}
}
initDisplay { |bounds|
var cbar, tbar;
view = SCVLayoutView(w, bounds);
view.background_(Color.grey);
cbar = SCHLayoutView(view, Rect(5, 5, 510, 25));
mainbutton = SCButton(cbar, 100 @ 20)
.states_([
[ "Play", Color.black, Color.green ],
[ "Stop", Color.white, Color.red ]
])
.action_{ |button|
button.value.switch(
0, { this.stop },
1, { this.play }
)
}
.keyDownAction_{ nil };
SCStaticText(cbar, 30 @ 20)
.string_("");
SCStaticText(cbar, 30 @ 20)
.string_("BPM");
SCSlider(cbar, 60 @ 20)
.action_{ |slid|
var spec = [80, 180, \linear, 1].asSpec;
tempoBox.value = spec.map(slid.value);
}
.keyDownAction_{ nil }
.value_(0.5);
tempoBox = SCNumberBox(cbar, Rect(5, 5, 60, 20))
.value_(130);
SCStaticText(cbar, 30 @ 20)
.string_("");
SCStaticText(cbar, 42 @ 20)
.string_("XFader");
xfadeslid = SCSlider(cbar, 60 @ 20)
.action_{ |slider|
xfadeval = slider.value;
beatbox.refresh;
}
.keyDownAction_{ nil };
tbar = SCHLayoutView(view, Rect(5, 5, 510, 20));
SCStaticText(tbar, Rect(5, 5, 60, 20));
16.do { |n|
indicators[n] = SCButton(tbar, Rect(5, 5, 20, 20))
.states_([
[ "", Color.grey, Color.grey ],
[ "", Color.black, Color.green ]
])
.enabled_(false)
};
channels.size.do { |channel|
var button;
var hbox = SCHLayoutView(view, Rect(5, 5, 380, 20));
hbox.background_(Color(0.4, 0.4, 0.4));
button = SCButton(hbox, Rect(5, 5, 60, 20))
.states_([
[ "Select", Color.black, Color.grey ],
[ "Select", Color.black, Color.yellow ]
])
.action_{ |thisButton|
view.children[2..channels.size+1].do { |hbox, n|
var anotherButton = hbox.children.first;
if(thisButton == anotherButton) {
currentChannel = n;
thisButton.value = 1;
beatbox.scope.refresh;
beatbox.updateLowerStatus;
} {
anotherButton.value = 0;
}
}
}
.keyDownAction_{ nil };
if(channel == 0)
{ button.value = 1 } { button.value = 0 };
selects.add(button);
16.do { |n|
var button;
button = SCButton(hbox, Rect(5, 5, 20, 20))
.states_([
[ "", Color.white, Color.grey ],
[ "x", Color.black, Color.yellow ],
[ "x", Color.black, Color(1.0, 0.55, 0.0) ],
[ "X", Color.white, Color.red ]
])
.action_{ |button|
buttonvals[channel][n] = button.value;
}
.keyDownAction_{ nil };
buttons[channel].add(button);
buttonvals[channel].add(0);
}
}
}
play {
if(playing.not) {
startedTime = SystemClock.seconds;
routine.play;
playing = true;
mainbutton.value = 1;
}
}
stop {
if(playing) {
routine.stop;
this.initRoutine;
beatbox.jam(0);
indicators.do { |light| { light.value = 0 }.defer(0.2) };
playing = false;
mainbutton.value = 0;
}
}
setCurrentHit {
var currentHit = this.currentHit;
beats[currentChannel].play;
buttonvals[currentChannel][currentHit] = 2;
buttons[currentChannel][currentHit].value = 2;
}
clearCurrentHit {
var currentHit = this.currentHit;
buttonvals[currentChannel][currentHit] = 0;
buttons[currentChannel][currentHit].value = 0;
}
currentHit {
var durplaying, bardur, sdur, thisbar, currhit;
if(playing) {
durplaying = SystemClock.seconds - startedTime;
bardur = (60 / tempoBox.value) * 4;
sdur = bardur / 16;
thisbar = durplaying % bardur;
currhit = ((thisbar / sdur).asInteger - 1) % 16;
^currhit
} {
^0
}
}
allButtons {
^view.children[1..9].collect{ |hview|
hview.children[1..16]
};
}
numChannels {
^channels.size;
}
previewCurrentChannel {
beats[currentChannel].play(xfadeval, 0.7)
}
}

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@ -1,11 +0,0 @@
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="Content-Style-Type" content="text/css">
<title></title>
<meta name="Generator" content="Cocoa HTML Writer">
<meta name="CocoaVersion" content="949.35">
<style type="text/css">
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Helvetica}
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span.s1 {text-decoration: underline}
</style>
</head>
<body>
<p class="p1"><b>AverageOutput</b></p>
<p class="p2"><br></p>
<p class="p3">The mean average output since the last received trigger.</p>
<p class="p2"><br></p>
<p class="p4"><b><span class="s1">Class methods</span></b></p>
<p class="p2"><br></p>
<p class="p5"><b>*ar(in, trig, mul, add)</b></p>
<p class="p5"><b>*kr(in, trig, mul, add)</b></p>
<p class="p6"><b></b><br></p>
<p class="p6"><b></b><br></p>
<p class="p3"><b>in - </b>input signal.</p>
<p class="p2"><br></p>
<p class="p3"><b>trig</b> -<span class="Apple-converted-space">  </span>if changes from &lt;= 0 to &gt; 0, resets average and count to zero.</p>
<p class="p2"><br></p>
<p class="p2"><br></p>
<p class="p3"><i>Examples</i></p>
<p class="p7"><br></p>
<p class="p8">// sine oscillator, average slowly settles to zero</p>
<p class="p9">a = { AverageOutput.ar(SinOsc.ar(10000)).poll }.play;</p>
<p class="p7"><br></p>
<p class="p9">a.free;</p>
</body>
</html>

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>rfwatson/live-beatbox @ GitHub</title>
<style type="text/css">
body {
margin-top: 1.0em;
background-color: #e85a30;
font-family: "helvetica";
color: #ffffff;
}
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margin: 0 auto;
width: 700px;
}
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.footer { text-align:center; padding-top:30px; font-style: italic; }
</style>
</head>
<body>
<a href="http://github.com/rfwatson/live-beatbox"><img style="position: absolute; top: 0; right: 0; border: 0;" src="http://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub" /></a>
<div id="container">
<div class="download">
<a href="http://github.com/rfwatson/live-beatbox/zipball/master">
<img border="0" width="90" src="http://github.com/images/modules/download/zip.png"></a>
<a href="http://github.com/rfwatson/live-beatbox/tarball/master">
<img border="0" width="90" src="http://github.com/images/modules/download/tar.png"></a>
</div>
<h1><a href="http://github.com/rfwatson/live-beatbox">live-beatbox</a>
<span class="small">by <a href="http://github.com/rfwatson">rfwatson</a></small></h1>
<div class="description">
experimental voice-powered drum sequencer
</div>
<p>some main project text</p><h2>Dependencies</h2>
<p>blah</p>
<h2>Install</h2>
<p>blah</p>
<h2>License</h2>
<p>etc etc</p>
<h2>Authors</h2>
<p>rob (rfwatson@gmail.com) <br/> <br/> </p>
<h2>Contact</h2>
<p>Rob Watson (rfwatson@gmail.com) <br/> </p>
<h2>Download</h2>
<p>
You can download this project in either
<a href="http://github.com/rfwatson/live-beatbox/zipball/master">zip</a> or
<a href="http://github.com/rfwatson/live-beatbox/tarball/master">tar</a> formats.
</p>
<p>You can also clone the project with <a href="http://git-scm.com">Git</a>
by running:
<pre>$ git clone git://github.com/rfwatson/live-beatbox</pre>
</p>
<div class="footer">
get the source code on GitHub : <a href="http://github.com/rfwatson/live-beatbox">rfwatson/live-beatbox</a>
</div>
</div>
</body>
</html>

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(
Server.local.doWhenBooted {
BeatBox(Document.current.dir);
};
)

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// This is the script I used to batch analyse a directory of audio samples.
// It scans a directory, analyses each suitable audio
// sample found and stores the results in the environment variable
// ~output.
// This output should be saved in a file called "data.sc" in the root directory.
// At present sound samples are limited to 1 second in length..
// TODO improve this system!
(
var maxFrames = 44100;
var path = Document.current.dir ++ "/samples/".standardizePath; // edit to your path
var files = (path ++ "*.wav").pathMatch;
~output = ();
Routine {
files.do { |fname|
var len;
try {
Post << "Processing " << fname << $\n;
Beat.newFromPath(fname, s) { |beat|
beat.analyse { |beat|
~output[fname] = beat.features;
};
};
} { |error|
error.errorString.postln;
};
1.wait
};
}.play;
)

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sounds-CREDIT
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the included sounds come from the public domain "Alex Calver Sample Pack"

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src/RFWGens.cpp
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/*
SuperCollider real time audio synthesis system
Copyright (c) 2002 James McCartney. All rights reserved.
http://www.audiosynth.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
//ACMC demo UGen
#include "SC_PlugIn.h"
static InterfaceTable *ft;
struct AverageOutput : public Unit {
float average, prev_trig;
uint32 count;
};
extern "C" {
void AverageOutput_next(AverageOutput *unit, int inNumSamples);
void AverageOutput_Ctor(AverageOutput* unit);
void AverageOutput_Dtor(AverageOutput* unit);
}
void AverageOutput_Ctor( AverageOutput* unit ) {
unit->average = 0.;
unit->count = 0;
unit->prev_trig = 0.;
RGen& rgen = *unit->mParent->mRGen;
SETCALC(AverageOutput_next);
}
void AverageOutput_Dtor(AverageOutput *unit) {
// nothing to do here
}
void AverageOutput_next( AverageOutput *unit, int inNumSamples ) {
int i;
float *in = IN(0);
float *out = ZOUT(0);
float trig = ZIN0(1);
float prev_trig = unit->prev_trig;
double average = unit->average;
uint32 count = unit->count;
if(prev_trig <= 0. && trig > 0.) {
average = 0.;
count = 0;
}
for (i=0; i<inNumSamples; ++i) {
average = ((count * average) + *(in+i)) / ++count;
ZXP(out) = average;
}
unit->prev_trig = trig;
unit->count = count;
unit->average = average;
}
extern "C" void load(InterfaceTable *inTable) {
ft = inTable;
DefineDtorUnit(AverageOutput);
}

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cp /Applications/SuperCollider3/build/plugins/RFWGens.scx /l/cm2/coursework/task3/plugins

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synthdefs.sc
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SynthDef(\beatboxlistener) { |out=0, in=0, amp=1.0, threshold=0.3, lag=0.1, t_resetRecord=0.0, fftbuf, recbuf|
var input, chain, onsets, peak;
input = SoundIn.ar(in);
chain = FFT(fftbuf, input);
onsets = Onsets.kr(chain, threshold, \rcomplex);
peak = PeakFollower.ar(input, 0.01).lag(lag);
RecordBuf.ar(input, bufnum: recbuf, trigger: t_resetRecord);
SendTrig.kr(onsets, value: 1);
SendTrig.ar((peak < 0.0002), value: 2);
Out.ar(out, input * amp);
}.load(s);
// TODO Envelope recognition? This is pretty good at selecting timbres but often the envelopes
// of the two sounds (perceptually just as important??) are very different.
SynthDef(\beatboxanalyzer) { |out=0, fftbuf, bufnum, cbus1, cbus2, cbus3, t_reset=0.0|
var sig, inbuf, chain, coeffs, centroid, zcr;
sig = PlayBuf.ar(numChannels: 1, bufnum:bufnum);
chain = FFT(fftbuf, sig, wintype: 1); // Hann windowing
coeffs = MFCC.kr(chain, 20);
centroid = SpecCentroid.kr(chain).linlin(100, 10000, 0, 1.5, \minmax); // perhaps a slight weighting
zcr = ZeroCrossing.ar(sig).linlin(100, 10000, 0, 1.5, \minmax); // towards these two
Out.kr(cbus1, AverageOutput.kr(coeffs, trig: t_reset));
Out.kr(cbus2, AverageOutput.kr(centroid, trig: t_reset));
Out.kr(cbus3, A2K.kr(AverageOutput.kr(zcr, trig: t_reset)));
}.load(s);
SynthDef(\beatboxplayer) { |out=0, bufnum1, bufnum2, crossfade=0.0, mul=1.0|
var p1 = PlayBuf.ar(numChannels: 1, loop: 0, bufnum: bufnum1);
var p2 = PlayBuf.ar(numChannels: 1, loop: 0, bufnum: bufnum2);
var amp1 = 1 - crossfade;
var amp2 = crossfade;
var dur = BufDur.kr(bufnum1);
var env = EnvGen.kr(Env([1,1,0], [dur * 0.9, dur]));
Out.ar(out,
mul * Pan2.ar(
(((p1 * 0.5) * (env * amp1)) + ((p2 * 0.5) * (env * amp2)));
)
);
}.load(s);