Stepper | SuperCollider 3.12.2 Help

Description

Each trigger increments a counter which is output as a signal. The counter wraps between min and max .

Class Methods

Stepper.ar(trig: 0, reset: 0, min: 0, max: 7, step: 1, resetval)

Stepper.kr(trig: 0, reset: 0, min: 0, max: 7, step: 1, resetval)

Arguments:

trig	The trigger. Trigger can be any signal. A trigger happens when the signal changes from non-positive to positive.
reset	Resets the counter to `resetval` when triggered.
min	Minimum value of the counter.
max	Maximum value of the counter.
step	Step value each trigger. May be negative.
resetval	Value to which the counter is reset when it receives a reset trigger. If nil, then this is patched to `min` .

Examples

SynthDef("help-Stepper",{ arg out=0;
    Out.ar(out,
        SinOsc.ar(
            Stepper.kr(Impulse.kr(10), 0, 4, 16, 1) * 100,
            0, 0.05
        )
    )
}).play;

SynthDef("help-Stepper",{ arg out=0;
    Out.ar(out,
        SinOsc.ar(
            Stepper.kr(Impulse.kr(10), 0, 4, 16, -3) * 100,
            0, 0.05
        )
    )
}).play;

SynthDef("help-Stepper",{ arg out=0;
    Out.ar(out,
        SinOsc.ar(
            Stepper.kr(Impulse.kr(10), 0, 4, 16, 4) * 100,
            0, 0.05
        )
    )
}).play;

///////////////////////////////////////////////////////////////////////////////////
//
// Using Stepper and BufRd for sequencing
//

s.boot;

s.sendMsg(\b_alloc, 10, 128);

m = #[0,3,5,7,10];

a = ({rrand(0,15)}.dup(16).degreeToKey(m) + 36).midicps;
s.performList(\sendMsg, \b_setn, 10, 0, a.size, a);

(
SynthDef(\stepper, { |out|
    var rate, clock, index, freq, ffreq, env, out, rev, lfo;

rate = MouseX.kr(1,5,1);
    clock = Impulse.kr(rate);
    env = Decay2.kr(clock, 0.002, 2.5);
    index = Stepper.kr(clock, 0, 0, 15, 1, 0);
    freq = BufRd.kr(1, 10, index, 1, 1);
    freq = Lag2.kr(freq) + [0,0.3];
    ffreq = MouseY.kr(80,1600,1) * (env * 4 + 2);
    out = Mix.ar(LFPulse.ar(freq * [1, 3/2, 2], 0, 0.3));
    out = RLPF.ar(out, ffreq, 0.3, env);
    out = RLPF.ar(out, ffreq, 0.3, env);
    out = out * 0.02;

// echo
    out = CombL.ar(out, 1, 0.66/rate, 2, 0.8, out);

// reverb
    rev = out;
    5.do { rev = AllpassN.ar(rev, 0.05, { 0.05.rand }.dup, rrand(1.5,2.0)) };
    out = out + (0.3 * rev);

out = LeakDC.ar(out);

// flanger
    lfo = SinOsc.kr(0.2, [0,0.5pi], 0.0024, 0.0025);
    1.do { out = DelayL.ar(out, 0.1, lfo, 1, out) };

// slight bass emphasis
    out = OnePole.ar(out, 0.9);

Out.ar(out, out);

}).add;
)

s.sendMsg(\s_new, \stepper, 1000, 0, 0);

a = ({rrand(0,15)}.dup(16).degreeToKey(m) + 38).midicps;
s.performList(\sendMsg, \b_setn, 10, 0, a.size, a);

a = a * 2.midiratio; // transpose up 2 semitones
s.performList(\sendMsg, \b_setn, 10, 0, a.size, a);

(
a = [ 97.999, 195.998, 523.251, 466.164, 195.998, 233.082, 87.307, 391.995, 87.307, 261.626, 195.998, 77.782, 233.082, 195.998, 97.999, 155.563 ];
s.performList(\sendMsg, \b_setn, 10, 0, a.size, a);
)

s.sendMsg(\n_free, 1000);

helpfile source: /usr/local/share/SuperCollider/HelpSource/Classes/Stepper.schelp
link::Classes/Stepper::

Stepper : UGen : AbstractFunction : Object

Description

Class Methods

Stepper.ar(trig: 0, reset: 0, min: 0, max: 7, step: 1, resetval)

Stepper.kr(trig: 0, reset: 0, min: 0, max: 7, step: 1, resetval)

Arguments:

Inherited class methods

Instance Methods

Inherited instance methods

Examples