Cycling '74 spectral cross-synthesis phase vocoder convolution

Spectral Processing

The pfft~ object provides an interface and management tool for spectral audio processing, utilizing the Fast Fourier Transform (FFT). FFT allows you to translate audio data from the time domain into the frequency domain. With this, you can create dynamic processing effects like time stretching, filtering, and cross synthesis. In combination with Gen, you can make even more efficient frequency-domain processing such as spectral delays using gen~ inside pfft~.

Online Tutorials

MSP Example Patches

  • convolution-workshop.maxpat - Some convolution examples
  • cross-dog.maxpat - Cross synthesis demonstration
  • forbidden-planet.maxpat - FFT-based graphic EQ
  • phase-vocoder-sampler.maxpat - A phase vocoder sampler
  • sonograph.maxpat - An FFT-based sonograph

gen~ Example Patches

  • gen~.pfft_centroid.maxpat - gen~-based spectral centroid calculator
  • gen~.pfft_example.maxpat - gen~-based FFT filter
  • gen~.pfft.vectral.maxpat - gen~-based lowpass smoothing of FFT filter bins

Max for Live Devices

  • Max SpectralDelay.amxd - Spectral delay
  • Max SpectralHarm.amxd - Spectral harmonizer
  • Spectral Filter.amxd - Spectral filter