Portuguese developer Imaginando has released COLAPSO, a new synthesizer plugin with one of the more unusual sound sources we've seen in a while: the light given off by atoms. Pick a chemical element, and COLAPSO turns that element's real emission spectrum into the partials of the note you play.
COLAPSO is out now for macOS and Windows, with a launch price of €69 (down from €89) until November 1, 2026.
A synth that plays the periodic table
When an excited atom "collapses," an electron drops to a lower energy level and releases light at a very specific wavelength. Each element produces its own set of these sharp emission lines. COLAPSO takes those lines, measured in a laboratory and cross-checked against the NIST Atomic Spectra Database, and transposes them down into the range of human hearing.
You can choose from 22 elements. In each one, a line's wavelength sets the frequency of a partial, its brightness sets the level, and its measured lifetime sets how long it rings. Imaginando says elements in the same column of the periodic table sound related, and a Mix control morphs from one element into another while the pitch you play stays the same.
Time or pitch, never both
The main control is called Observation, and it's a musical take on the uncertainty principle: a sound can be precise in time or precise in pitch, but not both at once. At one end you get a broadband click, at the other a pure, stable tone, with a wide range of textures in between. You don't need a physics degree to use it, since a help mode explains every control in plain terms.
Because every partial fades at its own rate, as it would in a real atom, the timbre keeps shifting while you hold a note. Strong lines tend to die first while long-lived ones ring on. Temperature, Field, and Absorption controls push things further by heating the spectrum, splitting it, and flipping it into noise.
A full synth around the concept
Beyond the atomic engine, COLAPSO is a complete instrument:
- Three oscillators per voice, each with up to 16 partials.
- Up to 8 voices in Poly, Mono, or Unison modes.
- Nine filter circuits.
- Four LFOs and four envelopes that you draw rather than pick from presets.
- Built-in effects and more than 200 factory presets.
Price, formats, and availability
COLAPSO runs as a VST, VST3, and AU plugin and as a standalone app on macOS 13 or later (native on Apple Silicon) and Windows 10 or later. It costs €69 until November 1, 2026, then €89. It's also included in Imaginando's Synth Bundle alongside DRC and FRMS for €189, and a rent-to-own option is available.
There's a free demo with no time limit and every parameter unlocked. Until it's licensed, a short noise burst plays every 60 seconds and saving is disabled. Verified students and teachers get 50% off through Imaginando's education program.
Full details are on the COLAPSO product page and in Imaginando's COLAPSO announcement.
Images in this article are from Imaginando.