UPIC System

Definition

The UPIC (Unité Polyagogique Informatique du CEMAMu) is a digital composition and synthesis workstation created by Iannis Xenakis that allows users to compose music by directly drawing lines and waveforms on a digitized graphic tablet.

Key Characteristics

  • Direct 2D mapping of visual graphic gestures into acoustic frequency, duration, and amplitude
  • Custom drawn waveform oscillators replacing standard Fourier harmonics
  • Non-hierarchical interface enabling intuitive spatial composition

Applications

  • Graphic score generation and visual music software
  • Interactive touchscreen audio visualizers and spectrogram re-synthesis
  • Creative coding sound tools (Tone.js, Web Audio API frequency mappers)

Mentions in Source

  • “The UPIC turned drawing directly into sound synthesis, erasing the division between graphic geometry and musical notation.” — Iannis Xenakis and UPIC