Description

Ndef registers synths by key. All accesses to the registered synths go through the Ndef class via that key. Registered synths can be replaced with other synths while playing. A synth and its replacement can automatically crossfade and the replacement time can be quantized.

Ndef is a reference to a proxy, forms an alternative to ProxySpace. All methods are inherited from NodeProxy.Ndef(key) //returns the instance Ndef(key, obj) //stores the object and returns the instance, like Tdef and Pdef.

Graphical editor overviewing all current Ndefs: NdefMixer. A general overview: JITLib.

First Example

s.boot; Ndef(\a).play; // play to hardware output. Ndef(\a).fadeTime = 2; // fadeTime specifies crossfade // set the source Ndef(\a, { SinOsc.ar([350, 351.3], 0, 0.2) }); Ndef(\a, { Pulse.ar([350, 351.3] / 4, 0.4, 0.2) }); Ndef(\a, Pbind(\dur, 0.03, \freq, Pbrown(0, 1, 0.1, inf).linexp(0, 1, 200, 350))); Ndef(\a, { Ringz.ar(Ndef.ar(\b), [350, 351.3] * 2, 0.4) }); Ndef(\b, { Impulse.ar([5, 7]/2, [0, 0.5], 0.15) }); Ndef.clear(3); // clear all after 3 seconds

Class Methods

Creation

Ndef.new(key, object)

Ndef.ar(key, numChannels, offset: 0)

Ndef.kr(key, numChannels, offset: 0)

Ndef.clear(fadeTime)

Ndef.defaultServer

Ndef.defaultServer = value

Ndef.all

Ndef.all = value

Ndef.dictFor(server)

Setting default parameters

Behind every Ndef there is one single instance of ProxySpace per server used (usually just the one for the default server). This ProxySpace keeps default values for the proxies that can be set. This can be done by:// set default quant Ndef(\x).proxyspace.quant = 1.0;

The other values that can be set in such a way are: clock, fadeTime, quant, reshaping, awake.

Inherited class methods

Undocumented class methods

Ndef.gui(server, numItems, bounds, preset)

Instance Methods

Inherited instance methods

Undocumented instance methods

.copy(toKey)

.dup(n: 2)

.key

.key = value

.proxyspace

Examples

s.boot; Ndef(\sound).play; Ndef(\sound).fadeTime = 1; Ndef(\sound, { SinOsc.ar([600, 635], 0, SinOsc.kr(2).max(0) * 0.2) }); Ndef(\sound, { SinOsc.ar([600, 635] * 3, 0, SinOsc.kr(2 * 3).max(0) * 0.2) }); Ndef(\sound, { SinOsc.ar([600, 635] * 2, 0, SinOsc.kr(2 * 3).max(0) * 0.2) }); Ndef(\sound, Pbind(\dur, 0.17, \freq, Pfunc({ rrand(300, 700) })) ); Ndef(\lfo, { LFNoise1.kr(3, 400, 800) }); Ndef(\sound).map(\freq, Ndef(\lfo)); Ndef(\sound, { arg freq; SinOsc.ar([600, 635] + freq, 0, SinOsc.kr(2 * 3).max(0) * 0.2) }); Ndef(\lfo, { LFNoise1.kr(300, 400, 800) }); Ndef.clear; //clear all Ndefs

using Ndef inside other Ndefs

Ndef(\lfo2, { LFNoise1.kr(LFNoise1.kr(0.1).exprange(1, 300) ! 2, 400, 800) }); Ndef(\sound, { Blip.ar(Ndef.kr(\lfo2), 30) * 0.2 }).play; Ndef(\lfo2, { [MouseX.kr(10, 300, 1), MouseY.kr(10, 300, 1)] });

setting and mapping parameters

Ndef(\sound, { |freq = 56, numHarm = 10| Blip.ar(freq, numHarm, 30) * 0.2 }).play; Ndef(\sound).set(\freq, 15); Ndef(\sound).set(\freq, 15, \numHarm, 100); Ndef(\lfo, { LFNoise2.kr(2).exprange(10, 200) }); Ndef(\sound).map(\numHarm, Ndef(\lfo)); Ndef(\sound).set(\numHarm, nil); // unmap. Ndef(\sound).stop;

Reserved parameters

Three parameters are automatically specified if they don't exist in a given UGen function. You can override their use: [\out, \gate, \fadeTime]

Specifying your own envelope

If a UGen function that is passed to the proxy has its own envelope, and if this envelope can free the synth, the node proxy uses this envelope instead of making its own. If you provide a fadeTime argument, the proxy's fadeTime will be used.Ndef(\sound).fadeTime = 3; ( Ndef(\sound, { |fadeTime = 1, gate = 1| var e = Env.adsr(fadeTime, 0.01, 0.4, fadeTime).ar(2, gate); SinOsc.ar(100 + (e * 700), SinOsc.ar(208) * (1 - e) * 6) * e * 0.1 }).play )

Simple audio routing with the <<> operator

( Ndef(\sound, { RHPF.ar( \in1.ar([0, 0]) * \in2.ar([0, 0]), \freq.kr(6000, 2), \rq.kr(0.2) ) * 7 }).play; Ndef(\sound).fadeTime = 0.2; // avoid harsh clicks ) Ndef(\a, { SinOsc.ar(MouseX.kr(300, 1000, 1) * [1, 1.2], \phase.ar([0, 0]) * 0.2) }); Ndef(\b, { LFDNoise3.ar(MouseY.kr(3, 1000, 1) * [1, 1.2]) }); Ndef(\c, { LFTri.ar(MouseY.kr(3, 10, 1) * [1, 1.2]).max(0) }); Ndef(\a).fadeTime = 0.2; // avoid harsh clicks again Ndef(\sound) <<>.in1 Ndef(\a); Ndef(\sound) <<>.in2 Ndef(\b); Ndef(\sound) <<>.in2 Ndef(\c); Ndef(\a) <<>.phase Ndef(\sound); Ndef(\a) <<>.phase nil; // unmap Ndef.clear(3); // fade out and clear all Ndefs

Embedding multi-channel Patterns, playing Streams in parallel

Controlling multi-channeled sequenced streams and having independent control over filtering and node ordering is a difficult topic in SuperCollider. However, using Ndefs (or their superclass NodeProxy or a ProxySpace) may provide a convenient solution.// a SynthDef, creating single-channel grain when instantiated ( SynthDef(\grain, { |out=0, freq=300, amp=0.3| OffsetOut.ar(out, Pulse.ar(freq) * EnvGen.kr(Env.perc, doneAction: Done.freeSelf) * amp) }).add; ) // number of channels ~numChans = 5; // values in a Pattern may be set in various ways // here we use control buses, except for \dur which // doesn't accept a control bus in parallel playing streams // therefore we use PatternProxies ~durs = ~numChans.collect({ |i| PatternProxy(0.5 + (i/10)) }); // other parameters could as well be controlled in PatternProxies, // yet, control buses are convenient either ~freqs = Bus.control(s, ~numChans); ~freqs.setn(Array.geom(~numChans, 300, 1.1)); ~amps = Bus.control(s, ~numChans); ~amps.setn(0.2!~numChans); // the Pattern: a Ppar holding one Pbind for each channel, // all wrapped in a Pdef ( Pdef(\ppar, Ppar({ |i| Pbind( \instrument, \grain, // we only set a single channel \dur, ~durs[i], \freq, ~freqs.subBus(i).asMap, \amp, ~amps.subBus(i).asMap, // the Pattern will play to a yet unknown private bus // we only want to make sure the offset is right \channelOffset, i, ) }!~numChans) ) ) // initialize an Ndef that will hold the Pdef as its source // make sure the Ndef gets initialized to the right number of channels by calling 'mold' Ndef(\ppar).mold(~numChans, \audio, \elastic); Ndef(\ppar)[0] = Pdef(\ppar); // mix the 5 channel audio coming from Ndef(\ppar) down to stereo // Splay will spread the channels over the stereo panorama // possibly use headphones to clearly identify the effect Ndef(\stereo, { Splay.ar(\in.ar(0!~numChans)) }); // concatenate the Ndefs, so Ndef(\ppar)'s out will feed into Ndef(\stereo)'s in Ndef(\stereo) <<> Ndef(\ppar); Ndef(\stereo).play; // change durations ~durs.do({ |pp, i| pp.source = Pseq(Array.fib(5, i/10 + 0.1, i+1/5), inf) }); ~durs.do({ |pp, i| pp.source = 0.5 + (i/10) }); ~durs.do({ |pp| pp.source.postcs }); // frequencies ~freqs.setn(Array.geom(~numChans, 250, 1.6)); ~freqs.setn(Array.geom(~numChans, 300, 1.1)); // add a filter Ndef ( Ndef(\filter, { HPF.ar( \in.ar(0!~numChans), SinOsc.ar({|i| 2 + i}!~numChans) + 1 * \multFreq.kr(Array.geom(~numChans, 400, 2)) ) }).mold(~numChans, \audio, \elastic); ) // set a fadeTime for smooth transitions and add the filter to the chain #[ppar, stereo, filter].do({ |k| Ndef(k).fadeTime_(3) }); Ndef(\stereo) <<> Ndef(\filter) <<> Ndef(\ppar); // set filter param, considering fadeTime Ndef(\filter).xset(\multFreq, Array.rand(~numChans, 20, 10000)); Ndef.clear; Pdef.clear;

Making Copies

copy

Recursion

Ndefs can be used recursively. A structure like the following works:Ndef(\sound, { SinOsc.ar([600, 635], Ndef.ar(\sound), LFNoise1.kr(2).max(0) * 0.2) }); Ndef(\sound).play; Ndef.clear;

This is because there is a feedback delay (the server's block size), usually 64 samples, so that calculation can reiterate over its own outputs. For single sample feedback, see:(Platform.resourceDir +/+ "examples/demonstrations/single_sample_feedback.scd").openDocument;

Using different servers

// create a new server a = Server(\foo, NetAddr("127.0.0.1", 57123)).boot.makeWindow; Ndef(\sound, { SinOsc.ar([600, 635]) * SinOsc.kr(2).max(0) * 0.2 }).play; // play on default Ndef(\sound -> \foo, { SinOsc.ar([700, 745]) * SinOsc.kr(2).max(0) * 0.2 }).play;// play on foo // clear definitions Ndef(\sound -> \foo).clear(3); Ndef(\sound).clear(3); a.dump; // display settings of new server a.quit; // terminate new server

GUI

// create a window for a given Ndef Ndef(\sound).edit ( Ndef(\sound, { |freq = 440, rate = 2| SinOsc.ar(freq * [1, 1.625]) * SinOsc.kr(rate).max(0) * 0.2 }).play; ) // set lags for controls: Ndef(\sound).lag(\freq, 0.2, \rate, 0.5); Ndef(\sound).clear(1); // create a mixer for all Ndefs: NdefMixer(s);

Using Associations

For a complete list, see NodeProxy, and NodeProxy roles// setsrc ( Ndef(\x, \setsrc -> Pbind(\source, Pseq([ { LFTri.ar(280 * Line.kr(1.1, 0.4, rrand(2, 3)) + [0,1]) * 0.1 }, { Pulse.ar(40 + [0,1]) * 0.1 }, { LFTri.ar(LFTri.kr(1).round(1.0.rand) + 1 * 180 + [0,1], 0.04) * 0.3 }, ], inf), \dur, Prand([3, 2, 4], inf) ) ).play; )