/usr/share/SuperCollider/HelpSource/Classes/Pspawner.schelp is in supercollider-common 1:3.8.0~repack-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | class:: Pspawner
summary:: dynamic control of multiple event streams from a Routine
related:: Classes/Pspawn
categories:: Streams-Patterns-Events>Patterns>Parallel
description::
Pspawner allows a routine to dynamically start and stop subpatterns.
ClassMethods::
method::new
argument::function
The function defines a link::Classes/Routine:: that receives a link::Classes/Spawner:: as its sole argument. All control of subpatterns is through the spawner.
link::Classes/Spawner:: responds to the messages:
definitionlist::
## par ||
Begin an event stream in parallel to the routine. If delta is non-zero, the pattern will begin that many beats after 'now', provided that now + delta is later than the next event that the Spawner will generate. The method returns the stream. This may be called from any object.
## seq ||
Run the entire pattern and then return control to the routine.
## wait ||
Wait strong::dur:: seconds and then return control to the routine.
## suspend ||
Find the stream in the Spawner and stop it, returns nil if the stream is not found, the stream otherwise.
## suspendAll ||
Stop all substreams of the Spawner.
::
note::
We should move the documentation of above methods to the link::Classes/Spawner:: helpfile...
::
Examples::
code::
// example 1: a simple Pspawner
(
Pspawner({ | sp |
// parallel in-c'ish pulses will run throughout the example
sp.par(Pbind(*[ degree: [0,7], octave: 7, dur: 0.2, db: Pseq([-20, -24, -22, -24], inf)]) );
// scales in sequence with pauses
sp.seq(
Pbind(*[ degree: Pseq((0..7).mirror), dur: 0.2])
);
sp.wait(0.4);
sp.seq(
Ppar([
Pbind(*[ degree: Pseq((0..7).mirror), dur: 0.2, octave: 4]),
Pbind(*[ degree: Pseq((0..7).reverse.mirror), dur: 0.2])
])
);
sp.wait(3);
sp.seq(
Pbind(*[ degree: Pseq((0..7).mirror), dur: 0.2, mtranspose: (0,2..14)])
);
// scales overlaped at 0.4 second intervals
10.do {
sp.par(
Pbind(*[ degree: Pseq((0..7).mirror), dur: 0.2])
);
sp.wait(0.4)
};
sp.wait(1.6);
sp.suspendAll;
}).play
)
(
// example 2: create 6 streams at 4 second intervals
// then delete them in the order they were created
Pspawner({ | sp |
var streams, stream;
// start patterns, collect the resultant event streams
streams = [2, 3, 4, 6, 7, 8].collect { | i |
stream = sp.par(Pbind(*[
harmonic: i,
ctranspose: [0, 1, 3]/40,
octave: Pbrown(2,8,2), dur: 1/i, db: -30
]) );
sp.wait(4);
stream;
};
// now stop those streams one by one
streams.do { | s | sp.suspend(s); sp.wait(4) };
}).play
)
(
// example 3: define a Pspawner and use Pattern manipulations
p = Pspawner({ | sp |
var pat = Pbrown( -7, 7, 3);
sp.par(Pbind(*[octave: 5, degree: pat, dur: 1/4]) );
sp.wait(2);
sp.par(Pbind(*[octave: 6, degree: pat, dur: 1/8]) );
sp.wait(3);
sp.par(Pbind(*[octave: 7, degree: pat, dur: 1/6, db: -20]) );
sp.wait(4);
sp.par(Pbind(*[octave: 4, degree: pat, dur: 1/4]) );
sp.wait(8);
sp.suspendAll;
});
)
// play the basic patten
p.play;
(
// manipulate basic pattern with Pchain
Pchain(
Pbind(*[mtranspose: Pkey(\mtranspose) + Pstutter(8, Prand([0,[0,3,-2],[0,2,4]], inf)) ] ), //make some notes into triads
Pbind(*[ctranspose: Pwhite(-0.1, 0.1)]), //add random detuning to notes
Pbind(*[\scale, Scale.minor]), //alter the scale
Pn(Pseq([p, (type:\rest, dur: 1.0)]) ), //repeat the pattern after a 1 second pause
Pbind(*[
db: Pstep(Pseq([-10, -13, -13, -11, -13, -13], inf), 0.1) - 10,
mtranspose: Pstep(Pwhite(-7,7), Prand([5,4,2],inf) ) //random modal transposition
])
).play(protoEvent: Event.default)
)
// example 4: altering the contents of the Pspawner from separate code
(
a = Pspawner({ |sp |
c = sp; // store the Spawner in a global variable
100.do{ sp.wait(1) }
});
a.play;
)
( // c will not be valid until the Pspawner has run
b = c.par( // now start a pattern in spawner
Pbind(*[degree: Pseq((0..6) ++ (7..1), inf), dur: 0.2])
);
)
c.suspend(b) // we can suspend and resume the stream
c.par(b)
c.suspend(b)
(
b = c.par( // or just start up a new pattern
Pbind(*[degree: Pseq((0..6) ++ (7..1), inf), dur: 0.2])
);
)
// example 5: Spawner can be used directly in the manner of Pspawner.
// This allows external code to access to the spawner whether or not it has run
(
c = Spawner({ |sp |
100.do{ sp.wait(1) }
});
b = c.par( // now start a pattern in spawner
Pbind(*[degree: Pseq((0..6) ++ (7..1), inf), dur: 0.2])
);
c.play; // in this case, c is always valid
)
c.suspend(b) // we can suspend and resume the stream
c.par(b)
c.suspend(b)
(
b = c.par( // or just start up a new pattern
Pbind(*[degree: Pseq((0..6) ++ (7..1), inf), dur: 0.2])
);
)
(
Pspawner({ | sp |
(1..5).do { | i |
sp.par(Pbind(*[
octave: i + 2,
degree: Pwhite(0,7), dur: 1/i, db: -30
]) );
sp.wait(4);
};
sp.suspendAll;
}).play
)
::
|