Packages

final case class KeyTrack(chain: GE, keyDecay: GE = 2.0f, chromaLeak: GE = 0.5f) extends SingleOut with ControlRated with IsIndividual with Product with Serializable

A (12TET major/minor) key tracker UGen. It is based on a pitch class profile of energy across FFT bins and matching this to templates for major and minor scales in all transpositions. It assumes a 440 Hz concert A reference. Output is 0-11 C major to B major, 12-23 C minor to B minor.

chain

the output (buffer) of an FFT UGen which transforms the audio input to track. For the FFT chain, with a standard hop of half FFT size, the FFT size should be 4096 at 44.1 or 48 kHz and 8192 at 88.2 or 96 kHz sampling rate.

keyDecay

Number of seconds for the influence of a window on the final key decision to decay by 40dB (to 0.01 its original value). Can be control-rate modulated.

chromaLeak

Each frame, the chroma values are set to the previous value multiplied by this chroma decay. 0.0 will start each frame afresh with no memory. Can be control-rate modulated.

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

Instance Constructors

  1. new KeyTrack(chain: GE, keyDecay: GE = 2.0f, chromaLeak: GE = 0.5f)

    chain

    the output (buffer) of an FFT UGen which transforms the audio input to track. For the FFT chain, with a standard hop of half FFT size, the FFT size should be 4096 at 44.1 or 48 kHz and 8192 at 88.2 or 96 kHz sampling rate.

    keyDecay

    Number of seconds for the influence of a window on the final key decision to decay by 40dB (to 0.01 its original value). Can be control-rate modulated.

    chromaLeak

    Each frame, the chroma values are set to the previous value multiplied by this chroma decay. 0.0 will start each frame afresh with no memory. Can be control-rate modulated.

Value Members

  1. val chain: GE
  2. val chromaLeak: GE
  3. lazy val hashCode: Int
    Definition Classes
    UGenSource → AnyRef → Any
  4. val keyDecay: GE
  5. final def name: String
    Definition Classes
    UGenSource
  6. def productElementNames: Iterator[String]
    Definition Classes
    Product
  7. final def rate: Rate
    Definition Classes
    ControlRated