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 instanceNdef(key, obj) //stores the object and returns the instance, like Tdef and Pdef.Graphical editor overviewing all current Ndefs: NdefMixer. A general overview: JITLib.
s.boot;Ndef(\a).play; // play to hardware output.Ndef(\a).fadeTime = 2; // fadeTime specifies crossfade// set the sourceNdef(\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 secondsReturn a new node proxy and store it in a global ProxySpace under the key. If there is already an Ndef there, replace its object with the new one. The object can be any supported class, see NodeProxy: Supported sources help.
| key |
the name of the proxy (usually a symbol). If only the key is given and no object, it returns the proxy object: xxxxxxxxxxNdef(\x) // get the proxyIf key is an association, it is interpreted as key -> server name. (order changed in SC3.3 !). If no name is given, it uses the default server that was default when Ndef was first called. (to change it, see *defaultServer). |
| object |
an object xxxxxxxxxxNdef(\x, { Dust.ar }); // returns the proxy and set the source object. |
equivalent to *new(key).ar(numChannels, offset) (see BusPlug: -ar)
equivalent to *new(key).kr(numChannels, offset) (see BusPlug: -kr)
clear all proxies
set the default server (default: Server.default)
Return the dictionary of all servers, pointing to proxyspaces with Ndefs for each.
xxxxxxxxxxNdef.all;Return the proxyspace for a given server.
xxxxxxxxxxNdef.dictFor(s);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:
xxxxxxxxxx// set default quantNdef(\x).proxyspace.quant = 1.0;The other values that can be set in such a way are: clock, fadeTime, quant, reshaping, awake.
xxxxxxxxxxs.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 NdefsxxxxxxxxxxNdef(\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)] });xxxxxxxxxxNdef(\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;Three parameters are automatically specified if they don't exist in a given UGen function. You can override their use: [\out, \gate, \fadeTime]
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.
xxxxxxxxxxNdef(\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)xxxxxxxxxx(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 againNdef(\sound) <<>.in1 Ndef(\a);Ndef(\sound) <<>.in2 Ndef(\b);Ndef(\sound) <<>.in2 Ndef(\c);Ndef(\a) <<>.phase Ndef(\sound);Ndef(\a) <<>.phase nil; // unmapNdef.clear(3); // fade out and clear all NdefsControlling 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.
xxxxxxxxxx// 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 effectNdef(\stereo, { Splay.ar(\in.ar(0!~numChans)) });// concatenate the Ndefs, so Ndef(\ppar)'s out will feed into Ndef(\stereo)'s inNdef(\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 fadeTimeNdef(\filter).xset(\multFreq, Array.rand(~numChans, 20, 10000));Ndef.clear;Pdef.clear;Because an Ndef is a unique instance for a given key, it can be copied only by supplying a new key. See also: NodeProxy: -copy.
xxxxxxxxxxNdef(\x, { SinOsc.ar(Rand(500, 900)) * 0.1 }).play;Ndef(\x).copy(\y);Ndef(\y).play;| newKey |
A valid new key, usually a Symbol |
Ndefs can be used recursively. A structure like the following works:
xxxxxxxxxxNdef(\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:
xxxxxxxxxx(Platform.resourceDir +/+ "examples/demonstrations/single_sample_feedback.scd").openDocument;xxxxxxxxxx// create a new servera = 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 defaultNdef(\sound -> \foo, { SinOsc.ar([700, 745]) * SinOsc.kr(2).max(0) * 0.2 }).play;// play on foo// clear definitionsNdef(\sound -> \foo).clear(3);Ndef(\sound).clear(3);a.dump; // display settings of new servera.quit; // terminate new serverxxxxxxxxxx// create a window for a given NdefNdef(\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);For a complete list, see NodeProxy, and NodeProxy roles
xxxxxxxxxx// 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;)