de.sciss.synth.ugen

SpecCentroid

final case class SpecCentroid(chain: GE) extends SingleOut with ControlRated with IsIndividual with Product with Serializable

A UGen to measure the spectral centroid. Given an FFT chain, this measures the spectral centroid, which is the weighted mean frequency, or the "centre of mass" of the spectrum. (DC is ignored.) This can be a useful indicator of the perceptual brightness of a signal.

Note that the output frequency is pretty close to the correct value when feeding in a sine signal, but the estimate is usually too high when using for example filtered noise. In that case, you will get better results using SpecPcile at 50%.

Note that despite running at control-rate, the output remains constant for each FFT frame. E.g. with an FFT size of 1024 and 50% overlap, a new measure is generated every 512 audio frames, or (at control block size 64) every 8 control blocks.

chain

the fft signal (buffer) to analyze

See also

SpecPcile

Linear Supertypes
Serializable, Serializable, IsIndividual, ControlRated, SingleOut, SomeOut, GE.Lazy, GE, UGenSource[UGenInLike], Expander[UGenInLike], Lazy, Product, Equals, AnyRef, Any
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  1. SpecCentroid
  2. Serializable
  3. Serializable
  4. IsIndividual
  5. ControlRated
  6. SingleOut
  7. SomeOut
  8. Lazy
  9. GE
  10. UGenSource
  11. Expander
  12. Lazy
  13. Product
  14. Equals
  15. AnyRef
  16. Any
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Instance Constructors

  1. new SpecCentroid(chain: GE)

    chain

    the fft signal (buffer) to analyze

Value Members

  1. final def !=(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  2. final def !=(arg0: Any): Boolean

    Definition Classes
    Any

  3. final def ##(): Int

    Definition Classes
    AnyRef → Any

  4. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

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

    Definition Classes
    Any

  6. final def asInstanceOf[T0]: T0

    Definition Classes
    Any

  7. val chain: GE

    the fft signal (buffer) to analyze

  8. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

    Definition Classes
    AnyRef

  10. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

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

    Definition Classes
    AnyRef → Any

  12. lazy val hashCode: Int

    Definition Classes
    UGenSource → AnyRef → Any

  13. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any

  14. def makeUGens: UGenInLike

    Attributes
    protected
    Definition Classes
    SpecCentroid → Expander

  15. final def name: String

    Definition Classes
    UGenSource

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

    Definition Classes
    AnyRef

  17. final def notify(): Unit

    Definition Classes
    AnyRef

  18. final def notifyAll(): Unit

    Definition Classes
    AnyRef

  19. final def rate: Rate

    Definition Classes
    ControlRated

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

    Definition Classes
    AnyRef

  21. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from Serializable

Inherited from Serializable

Inherited from IsIndividual

Inherited from ControlRated

Inherited from SingleOut

Inherited from SomeOut

Inherited from GE.Lazy

Inherited from GE

Inherited from UGenSource[UGenInLike]

Inherited from Expander[UGenInLike]

Inherited from Lazy

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

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