Phase Vocoder

Sound Production and Manipulation [SPM]  >  Synthesis and Resynthesis Techniques  ]

Phase vocoding is a complex signal-processing technique which includes elements of LPC (Linear Predictive Coding). It uses continuous and overlapping Fourier transforms of a sound for several related objectives, ranging from resynthesis, and timbral interpolation from one sound to another, to ’time-stretching’ (altering the speed of a sampled sound without affecting the pitch) and ’pitch shifting’ (transposition of a sound without altering the speed). The phase vocoder is so called to distinguish it from the more familiar ’channel’ vocoder. (Source - Richard Dobson (1992). A Dictionary of Electronic and Computer Music Technology. Oxford University Press.)

 

See also:

FFT, Linear Predictive Coding, Time-stretching

 

Bibliography:

English - Español - Français - Deutch - Italiano

Alphabetical order - Chronological order

Bailey, Nick, Cooper, David (2000). Perceptually Smooth Timbral Guides by State-Space Analysis of Phase-Vocoder Parameters
Dolson, Mark (1986). The Phase Vocoder: A Tutorial
Jones, David Evan (1984). Composer’s View - David Evan Jones
Rodet, Xavier (1996). Recent Developments in Computer Sound Analysis and Synthesis
Strawn, John (1982). Research on Timbre and Musical Contexts at CCRMA

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