index :: array

array.stretch

array time-stretch, pitch-shift or rate-change

доступно с версии: 0.4

---

информация

Based on SoundTouch library for changing the Tempo, Pitch and Playback Rates of arrays. Copies time-stretched data from source to destination array

аргументы:

• SRC source array
  тип: symbol
  

• DEST destination array
  тип: symbol
  

свойства:

• @src Запросить/установить source array
  тип: symbol
  

• @dest Запросить/установить destination array
  тип: symbol
  

• @tempo Запросить/установить relative tempo change without affecting the sound pitch
  тип: float
  единица: %
  диапазон: -50..100
  по умолчанию: 0
  

• @pitch Запросить/установить relative pitch change while keeping the original tempo
  тип: float
  единица: semitone
  по умолчанию: 0
  

• @rate Запросить/установить playback rate - changes both tempo and pitch together as if a vinyl disc was played at different RPM rate
  тип: float
  диапазон: 0.1..2
  по умолчанию: 1
  

• @speech Запросить/установить optimize for speech sound source
  тип: bool
  по умолчанию: 0
  

• @antialias Запросить/установить use of anti-alias filter. Anti-alias filter is used to prevent folding of high frequencies when transposing the sample rate with interpolation.
  тип: bool
  по умолчанию: 0
  

• @aalength Запросить/установить pitch transposer anti-alias filter length
  тип: int
  диапазон: 8..128
  по умолчанию: 64
  

• @sequence Запросить/установить Default length of a single processing sequence, in milliseconds. This determines to how long sequences the original sound is chopped in the time- stretch algorithm. The larger this value is, the lesser sequences are used in processing. In principle a bigger value sounds better when slowing down tempo, but worse when increasing tempo and vice versa. Increasing this value reduces computational burden & vice versa. Giving 0 value for the sequence length sets automatic parameter value according to tempo setting (recommended).
  тип: int
  единица: ms
  диапазон: 0..100
  по умолчанию: 0
  

• @seekwindow Запросить/установить Seeking window default length in milliseconds for algorithm that finds the best possible overlapping location. This determines from how wide window the algorithm may look for an optimal joining location when mixing the sound sequences back together. The bigger this window setting is, the higher the possibility to find a better mixing position will become, but at the same time large values may cause a "drifting" artifact because consequent sequences will be taken at more uneven intervals. If there's a disturbing artifact that sounds as if a constant frequency was drifting around, try reducing this setting. Increasing this value increases computational burden & vice versa. Giving 0 value for the seek window length sets automatic parameter value according to tempo setting (recommended)
  тип: int
  единица: ms
  диапазон: 0..100
  по умолчанию: 0
  

• @overlap Запросить/установить Overlap length in milliseconds. When the chopped sound sequences are mixed back together, to form a continuous sound stream, this parameter defines over how long period the two consecutive sequences are let to overlap each other. Increasing this value increases computational burden & vice versa.
  тип: int
  единица: ms
  диапазон: 0..100
  по умолчанию: 8
  

входы:

• starts processing
  тип: control

выходы:

• float value - number of result samples
  тип: control

ключевые слова:

array stretch

Авторы: Olli Parviainen, Serge Poltavsky

Лицензия: GPL3 or later