de.sciss.synth.ugen

LFPulse

object LFPulse extends Serializable

A non-band-limited pulse oscillator UGen. Outputs a high value of one and a low value of zero.

Examples
// modulating frequency
play { LFPulse.ar(XLine.kr(1, 200, 10), 0, 0.2) * 0.1 }
// modulating amplitude
play { LFPulse.kr(XLine.kr(1, 200, 10), 0, 0.2) * SinOsc.ar(440) * 0.1 }
// used as both oscillator and LFO
play { LFPulse.ar(LFPulse.kr(3, 0, 0.3).madd(200, 200), 0, 0.2) * 0.1 }
See also

Pulse

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  6. def ar(freq: GE = 440.0f, iphase: GE = 0.0f, width: GE = 0.5f): LFPulse

    freq

    oscillator frequency in Hertz

    iphase

    initial phase offset in cycles ( 0..1 ). If you think of a buffer of one cycle of the waveform, this is the starting offset into this buffer. Hence, an iphase of 0.25 means that you will hear the first impulse after 0.75 periods! If you prefer to specify the perceived delay instead, you could use an iphase of -0.25 + 1 which is more intuitive. Note that the phase is not automatically wrapped into the range of 0..1 , so putting an iphase of -0.25 currently results in a strange initial signal which only stabilizes to the correct behaviour after one period! (init-time only)

    width

    pulse width duty cycle from zero to one. If you want to specify the width rather in seconds, you can use the formula width = freq * dur , e.g. for a single sample impulse use width = freq * SampleDur.ir .

  7. def ar: LFPulse

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  16. def kr(freq: GE = 440.0f, iphase: GE = 0.0f, width: GE = 0.5f): LFPulse

    freq

    oscillator frequency in Hertz

    iphase

    initial phase offset in cycles ( 0..1 ). If you think of a buffer of one cycle of the waveform, this is the starting offset into this buffer. Hence, an iphase of 0.25 means that you will hear the first impulse after 0.75 periods! If you prefer to specify the perceived delay instead, you could use an iphase of -0.25 + 1 which is more intuitive. Note that the phase is not automatically wrapped into the range of 0..1 , so putting an iphase of -0.25 currently results in a strange initial signal which only stabilizes to the correct behaviour after one period! (init-time only)

    width

    pulse width duty cycle from zero to one. If you want to specify the width rather in seconds, you can use the formula width = freq * dur , e.g. for a single sample impulse use width = freq * SampleDur.ir .

  17. def kr: LFPulse

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