Phyllotactic FFT Spirals


March 7, 2024

Modifying phyllotactic patterns using fft of microphone input.

Note: to use the mic, the browser requires a user interaction – Click the rotating circle to begin!

Using the microphone - learning to love the FFT

The FFT (see 3b1b - But what is the Fourier Transform? ) converts a signal from the time domain to the frequency domain…


Time domain means the value the microphone is receiving at each point in time.

As a human I think more of pitch or frequency, and so we need to convert the fluctuation the microphone records back into a pitch.

p5.FFT has two parameters we can play with:

  • smoothing - impacts how fast the FFT responds to changes
  • size - the number of frequency bins (pitches) to analyze