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
See Also
| Name | Description |
|---|---|
| cartopol | Convert cartesian to polar coordinates |
| cartopol~ | Signal Cartesian to Polar coordinate conversion |
| fft~ | Fast Fourier transform |
| fftin~ | Input for a patcher loaded by pfft~ |
| fftinfo~ | Report information about a patcher loaded by pfft~ |
| fftout~ | Output for a patcher loaded by pfft~ |
| frameaccum~ | Compute "running phase" of successive phase deviation frames |
| framedelta~ | Compute phase deviation between successive FFT frames |
| ifft~ | Inverse fast Fourier transform |
| in | Message input for a patcher loaded by poly~ or pfft~ |
| out | Message output for a patcher loaded by poly~ or pfft~ |
| poltocar | Convert polar to cartesian coordinates |
| poltocar~ | Signal Polar to Cartesian coordinate conversion |
| vectral~ | Vector-based envelope follower |