Packages

final case class PV_JensenAndersen(rate: Rate, chain: GE, centroid: GE = 0.25f, hfe: GE = 0.25f, hfc: GE = 0.25f, flux: GE = 0.25f, thresh: GE = 1.0f, waitTime: GE = 0.04f) extends SingleOut with IsIndividual with Product with Serializable

An FFT based onset detector UGen using a mix of extracted features. It is based on work described in Jensen and Andersen (2003), "Real-time Beat Estimation Using Feature Extraction," in: Proceedings of the Computer Music Modeling and Retrieval Symposium.

First order derivatives of the features are taken. The threshold may need to be set low to pick up on changes.

chain

the fft signal (buffer) to analyze

centroid

proportion (0 to 1) of spectral centroid feature

hfe

proportion (0 to 1) of high frequency energy feature

hfc

proportion (0 to 1) of high frequency content feature

flux

proportion (0 to 1) of spectral flux feature

thresh

threshold level for detection

waitTime

after an onset is detected, further detections are suppressed for this period in seconds, preventing multiple rapid triggers

See also

Onsets

PV_HainsworthFoote

Linear Supertypes
Serializable, IsIndividual, SingleOut, SomeOut, GE.Lazy, GE, UGenSource[UGenInLike], Expander[UGenInLike], Lazy, Product, Equals, AnyRef, Any
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Inherited
  1. PV_JensenAndersen
  2. Serializable
  3. IsIndividual
  4. SingleOut
  5. SomeOut
  6. Lazy
  7. GE
  8. UGenSource
  9. Expander
  10. Lazy
  11. Product
  12. Equals
  13. AnyRef
  14. Any
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new PV_JensenAndersen(rate: Rate, chain: GE, centroid: GE = 0.25f, hfe: GE = 0.25f, hfc: GE = 0.25f, flux: GE = 0.25f, thresh: GE = 1.0f, waitTime: GE = 0.04f)

    chain

    the fft signal (buffer) to analyze

    centroid

    proportion (0 to 1) of spectral centroid feature

    hfe

    proportion (0 to 1) of high frequency energy feature

    hfc

    proportion (0 to 1) of high frequency content feature

    flux

    proportion (0 to 1) of spectral flux feature

    thresh

    threshold level for detection

    waitTime

    after an onset is detected, further detections are suppressed for this period in seconds, preventing multiple rapid triggers

Value Members

  1. val centroid: GE
  2. val chain: GE
  3. val flux: GE
  4. lazy val hashCode: Int
    Definition Classes
    UGenSource → AnyRef → Any
  5. val hfc: GE
  6. val hfe: GE
  7. final def name: String
    Definition Classes
    UGenSource
  8. def productElementNames: Iterator[String]
    Definition Classes
    Product
  9. val rate: Rate
    Definition Classes
    PV_JensenAndersen → GE
  10. val thresh: GE
  11. val waitTime: GE