A wave is energy that travels through space, oscillates over time.
Sound and light are characterized by the frequency and amplitude of their constituent waves.
Pitch is analogous to color; they are both described by frequency.
Volume is analogous to intensity; they are both described by amplitude.
Δ is a light harmonograph that examines the dimensionality of these wave features.
In particular, how light and sound act in motion through space and time — how they are perceived in the interstices of change along these dimensions.
In building Δ I want to understand these three guiding ideas.
Music marks the passage of time; alternatively, a sound sequence is indescribable without change in time.
Tones are described by their duration, melodies by changing tones over time, rhythms by silences in between.
An onset is a perceived beat in sound.
Sequential changes in sound energy are perceivable above a certain threshold — a delta.
Using an onset detection algorithm, Δ interprets music to control the pulsing of an LED.
Color loosely corresponds to pitch range, brightness to volume.
Light uncovers space; alternatively, space is imperceptible without light.
Using a mechanical arm with two degrees of freedom, Δ oscillates over time to trace a light image in space.
A zero-dimensional point of light sweeps many one-dimensional arcs across a two-dimensional plane.
Through light, audiovisual and mechanical elements collectively produce a spatial performance, set in time to a piece of music.
Isolating the spatial aspect of the device's performance creates a harmonograph image of the piece of music.
Music is translated into light, captured as representation — as visual information.
Using long exposure photography, the image of Δ's harmonic motion over time is projected onto one plane.
The result: a visual representation of the entire song over time.
Light and sound, two intangible qualities, are materialized in the Δ machine, performed by that machine, and encoded into the representation of a song through light.
Representations of select pieces of music as translated by Δ.