PV_JensenAndersen

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: PV_HainsworthFoote
Onsets

Linear Supertypes

Serializable, Serializable, IsIndividual, SingleOut, SomeOut, GE.Lazy, GE, UGenSource[UGenInLike], Expander[UGenInLike], Lazy, Product, Equals, AnyRef, Any

Instance Constructors

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

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
val centroid: GE

proportion (0 to 1) of spectral centroid feature
val chain: GE

the fft signal (buffer) to analyze
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def finalize(): Unit

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

proportion (0 to 1) of spectral flux feature
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
val hfc: GE

proportion (0 to 1) of high frequency content feature
val hfe: GE

proportion (0 to 1) of high frequency energy feature
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
def makeUGens: UGenInLike

Abstract method which must be implemented by creating the actual UGens during expansion.
Abstract method which must be implemented by creating the actual UGens during expansion. This method is at most called once during graph expansion
returns
the expanded object (depending on the type parameter U)

Attributes
protected
Definition Classes
PV_JensenAndersen → Expander
final def name: String

Definition Classes
UGenSource
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
val rate: Rate

Definition Classes
PV_JensenAndersen → GE
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
val thresh: GE

threshold level for detection
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
val waitTime: GE

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

Related Docs: object PV_JensenAndersen | package ugen

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

Instance Constructors

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)

Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

val centroid: GE

val chain: GE

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def finalize(): Unit

val flux: GE

final def getClass(): Class[_]

val hfc: GE

val hfe: GE

final def isInstanceOf[T0]: Boolean

def makeUGens: UGenInLike

final def name: String

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

val rate: Rate

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

val thresh: GE

final def wait(): Unit

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

final def wait(arg0: Long): Unit

val waitTime: GE

Inherited from Serializable

Inherited from Serializable

Inherited from IsIndividual

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

Ungrouped