CtkNote | SuperCollider 3.13.0 Help

Description

Part of the Composer's Tool Kit (CTK) system. See Ctk for more details.

CtkNotes are most easily created through the use of CtkProtoNotes and CtkSynthDef (CtkNoteObjects). Rarely will you create them directly (since it would be difficult to enable all of the functionality available). Examples below show the intended use.

In addition, getter and setter arguments are created for each instance of CtkNote based on the SynthDef's arguments.

Class Methods

.new

Note: This is not the usual way of creating new instances of CtkNotes. New instances are best created through instances of CtkNoteObject or CtkProtoNotes (see the examples)

Arguments:

starttime	In NRT or CtkScore rendering mode, the starttime of an CtkNote event. In real-time mode, this parameter will schedule the event for starttime seconds in the future.
duration	If not nil, schedules the release of an CtkNote (works in both real-time and non-real-time)
addAction	A symbol (\head, \tail, \before, \after or \replace) or an addAction id (see Server Command Reference: /s_new for a more in-depth description)
target	A node ID (synth or group) or an instance of CtkGroup or CtkNote
server	The server to execute the node on. Defaults to Server.default for real-time performance
synthdefname
noMaps

Returns:

an instance of CtkNote

Discussion:

Intended use - creating CtkNote from CtkSynthDef or CtkProtoNotess.boot; //using CtkSynthDef (access SynthDefs by individual variables) ( a = CtkSynthDef(\noise, {arg amp = 0.25; Out.ar(0, PinkNoise.ar(amp ! 2)); }); ); b = a.note; //returns a CtkNote b.play; //play in real-time b.free; //using CtkProtoNotes (access SynthDefs by name) ( a = CtkProtoNotes( SynthDef(\noise, {arg amp = 0.25; Out.ar(0, PinkNoise.ar(amp ! 2)); }) ); ); b = a[\noise].note; //returns a CtkNote b.play; //play in real-time b.free;

Instance Methods

.play

Play an instance of CtkNote, for real-time use.

NOTE: In order to ensure proper timing of scheduled events, CTK sends messages to the server as OSC bundles with a default latency of 0.1s (see Scheduling and Server timing). This is settable in CtkObj: *latency class variable. When CTK messages are meant to be set in real-time using input interfaces (MIDI, GUI etc), setting the CtkObj: *latency to 0 will result in processing the messages as soon as possible (but printing the "late" messages from the server as well).

Arguments:

group

Schedule with a given group.

.release

Releases CtkNote by setting its 'key' argument to 0.

Arguments:

time	In real-time mode,'time' schedules the release in the future (in seconds). In non-real-time mode, a message to release an instance of CtkNote is created at CtkNotes starttime + time.
key	'key' defaults to \gate for use in sustained envelopes.

.free

frees an instance of CtkNote.

Arguments:

time	In real-time mode, 'time' schedules the freeing of a node in the future. In non-real-time mode, a message to free the node is created at starttime + time.
addMsg	Add a message to send to the server.

.args

show the args

Arguments:

argdict

Returns:

CtkNote's args

Examples

Real-time uses

Examples that create new instances of a CtkNote directly from CtkProtoNotes

s = Server.internal.boot;
Server.default = s;

(
a = CtkProtoNotes(
    SynthDef(\test, {arg gate = 1, freq, amp;
        var env, envgen, src;
        env = Control.names([\env]).kr(Env.newClear(8));
        envgen = EnvGen.kr(env, gate, doneAction: 2);
        src = SinOsc.ar(freq, 0, amp * envgen);
        Out.ar(0, Pan2.ar(src, Rand(-1.0, 1.0)));
    }),
    SynthDef(\control, {arg outbus, rate, low, hi;
        Out.kr(outbus, LFNoise2.kr(rate).range(low, hi).poll)
    }),
    SynthDef(\test2, {arg gate = 1, freq, amp;
        var env, envgen, src;
        env = Control.names([\env]).kr(Env.newClear(8));
        envgen = EnvGen.kr(env, gate, doneAction: 2);
        src = BPF.ar(WhiteNoise.ar(amp), freq.poll, 0.01, amp * envgen);
        Out.ar(0, Pan2.ar(src, Rand(-1.0, 1.0)));
    })
);
)

b = a[\test2].note.freq_(440).amp_(1.0).env_(Env([0, 1, 0], [0.5, 0.5], \sin, 1)).play;
c = a[\test].note.freq_(440).amp_(0.1).env_(Env([0, 1, 0], [0.5, 0.5], \sin, 1)).play;

b.release;
c.release(2); // release in 2 seconds

z = CtkControl.play; // allocates a control bus from the server, and tells Ctk it is for RT use

// write values to z from a CtkNote
b = a[\control].note.outbus_(z.bus).rate_(2).low_(440).hi_(880).play;

// use the instance of CtkControl as an argument

c = a[\test2].note.freq_(z).amp_(3).env_(Env([0, 1, 0], [1, 1], \sin, 1)).play;
d = a[\test].note.freq_(z).amp_(0.2).env_(Env([0, 1, 0], [10, 0.1], \sin, 1)).play;

// arguments that are changed while a CtkNote is running will change that parameter in real-time
c.amp = 0.5;
d.amp = 0.05;

c.amp_(1);
d.amp_(0);

// release the nodes with \gate args, free the other after they have finished
[d, c].do({arg me; me.release}); b.free(1);

// play and schedule the release of the note

b = a[\test2].note
.freq_(440)
.amp_(1.0)
.env_(Env([0, 1, 0], [0.5, 0.5], \sin, 1))
.play;

b.release(4)

CtkScore examples

Examples that populate an instance of CtkScore. The CtkScore can then be rendered in NRT, played or saved as a file. See CtkScore for more examples.( var scpn, score, grainfun, gliss; // reset allocators for this run of the score ... good for repeated renderings s.newAllocators; scpn = CtkProtoNotes( SynthDef(\control, {arg outbus, rate, low, hi; Out.kr(outbus, LFNoise2.kr(rate).range(low, hi)) }), SynthDef(\test, {arg freq, amp, dur; var env, envgen, src; env = Env([0, 1, 0], [0.5, 0.5], \sin); envgen = EnvGen.kr(env, timeScale: dur); src = BPF.ar(WhiteNoise.ar(amp), freq, 0.01, amp * envgen); Out.ar(0, Pan2.ar(src, Rand(-1.0, 1.0))); }) ); score = CtkScore.new; /* creates a granular gesture of duration. Each grain is 0.1 seconds long, new grain every 0.02 seconds */ grainfun = {arg starttime, duration, ampenv, lowfreq, hifreq; var now, note; now = 0; ampenv.times = ampenv.times.normalizeSum * duration; // scale the Env's time to the gestures while({ // create a note... add it to the CtkScore note = scpn[\test].note(starttime + now, 0.1) .freq_(lowfreq.rrand(hifreq)) .amp_(ampenv[now]) .dur_(0.1); score.add(note); // tell CtkScore to add the note now = now + 0.02; now < duration; }); }; gliss = {arg starttime, duration, rate, lowfreq, hifreq; var cbus, control, note; cbus = CtkControl.new; control = scpn[\control].note(starttime, duration) .outbus_(cbus.bus) .rate_(rate) .low_(lowfreq) .hi_(hifreq) .addTo(score); // tell CtkNote to add to a CtkScore note = scpn[\test].note(starttime, duration, \after, control) .freq_(cbus) .amp_(2) .dur_(duration) .addTo(score); }; grainfun.value(1, 10, Env([0, 1, 0], [0.5, 0.5], [3, -5]), 440, 880); grainfun.value(4, 4, Env([0, 1, 0], [0.5, 0.5], [3, -5]), 4400, 8800); grainfun.value(6, 12, Env([0, 1, 0], [0.5, 0.5], [3, -5]), 300, 400); grainfun.value(3, 10, Env([0, 1, 0], [0.5, 0.5], [3, -5]), 200, 200); grainfun.value(1.5, 20, Env([0, 1, 0], [0.5, 0.5], [3, -5]), 7000, 7100); 5.do({arg i; var j; j = i + 1; gliss.value(3 + (i + 4), 10.rrand(7), j.reciprocal, 440 * j, 880 * j); }); // uncomment to play the CtkScore you have created score.play(s); // uncomment to write the score to a soundfile // score.write("~/Desktop/test.aiff".standardizePath, score.endtime, 48000, options: ServerOptions.new.numOutputBusChannels_(2)); // uncomment to save the CtkScore as a file // score.saveToFile("~/Desktop/test.sc".standardizePath); )

helpfile source: HelpSource/Classes/CtkNote.schelp
link::Ctk/Classes/CtkNote::

CtkNoteExtension

Description

Class Methods

.new

Arguments:

Returns:

Discussion:

Instance Methods

.play

Arguments:

.release

Arguments:

.free

Arguments:

.args

Arguments:

Returns:

Examples

Real-time uses

Examples that create new instances of a CtkNote directly from CtkProtoNotes

CtkScore examples

CtkNote
Extension