Object/Class

de.sciss.synth.ugen

HPZ1

Related Docs: class HPZ1 | package ugen

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object HPZ1 extends Serializable

A two point difference filter UGen. Implements the formula :

out(i) = 0.5 * (in(i) - in(i-1))

Note: the filter's memory is initialized with the first input sample, so for HPZ1.ar(DC.ar(x)) the output will be zero, even at the beginning.

Examples
// engage with mouse button
play {
  val sig = PinkNoise.ar
  val flt = HPZ1.ar(sig)
  LinXFade2.ar(sig, flt, MouseButton.kr(-1, 1))
}
// detect changes
play {
  val z  = LFNoise0.ar(2)
  val f  = HPZ1.ar(z)
  val ch = f sig_!= 0 // input increased or decreased
  z.poll(ch, "now")
  0
}
See also

Delay1

LPZ1

OneZero

Linear Supertypes
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  1. final def !=(arg0: Any): Boolean

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  2. final def ##(): Int

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  3. final def ==(arg0: Any): Boolean

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  4. def ar(in: GE): HPZ1

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    in

    input signal to be filtered

  5. final def asInstanceOf[T0]: T0

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  6. def clone(): AnyRef

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  7. final def eq(arg0: AnyRef): Boolean

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  8. def equals(arg0: Any): Boolean

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  9. def finalize(): Unit

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  10. final def getClass(): Class[_]

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  11. def hashCode(): Int

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  12. final def isInstanceOf[T0]: Boolean

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  13. def kr(in: GE): HPZ1

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    in

    input signal to be filtered

  14. final def ne(arg0: AnyRef): Boolean

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  15. final def notify(): Unit

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  16. final def notifyAll(): Unit

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  17. final def synchronized[T0](arg0: ⇒ T0): T0

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  18. def toString(): String

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  19. final def wait(): Unit

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  20. final def wait(arg0: Long, arg1: Int): Unit

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  21. final def wait(arg0: Long): Unit

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