Imaginando COLAPSO review: an atomic synth that rewards patience

Imaginando’s COLAPSO is an additive synthesiser that builds its sounds from the measured light spectra of 22 chemical elements. It asks you to work differently, but on pads, drones and evolving textures it repays the effort.

My usual process begins with a musical idea and, as a track develops, a reasonably clear picture of the sound I need. I’ll reach for a synth that I know will get me into the right ballpark, then start shaping something to fit. Imaginando’s COLAPSO took a bit of getting used to because I couldn’t immediately work that way with it.

I liked the idea before I got my hands on it: it seemed weird, unusual, creative and intriguing. Developed in Braga, Portugal, by the team behind DRC and FRMS, the synthesiser takes the measured emission spectra of 22 chemical elements and translates them into audible partials, each of which can decay at its own rate. A held note can therefore change character as its constituent parts fade away. Most additive synths, including the Harmonic engine in Arturia’s Pigments, leave you to design the partials yourself; here they come from laboratory measurements, which goes some way to explaining why it feels so different to steer. It’s a fascinating, if somewhat baffling, starting point for sound design. Most importantly, it sounds great.

Three oscillators, filters, drawable envelopes and LFOs provide familiar foundations, but then we quickly veer off piste with controls like Observation, Planck and Temperature. Observation moves between short, granular events and sustained tones, while Planck sets the minimum amount of blur that comes with that trade-off. Temperature shifts the balance between partials, much as heat changes which spectral lines glow, and pushed far enough it switches to a different spectrum altogether. Built-in help explains the terminology, although my producer brain initially struggled to connect the names with what I was hearing. I kept trying to translate each change into something familiar, until I had a word with myself and stopped worrying quite so much about what to call it.

Things became more enjoyable when I mapped controls to Ableton’s Push 3 and started listening to individual oscillators. With three running together, it had been difficult to hear what my adjustments were doing, but muting two gave me room to investigate, changing elements [name the elements you favoured] and following the sound as I turned each knob. Mapping corresponding controls across all three oscillators then opened up some genuinely radical sonic possibilities. I could still mute individual layers to hear how each contributed to the whole.

Away from the screen, I found myself listening much more intently. If a control introduced more noise than I wanted, I could pull it back; if that rougher edge gave the sound something useful, I could lean into it. There was still plenty of trial and error, but I was beginning to get a feel for how to direct it.

I usually build pads by layering sounds, giving one the lower mids, another the upper mids, and a third the high-frequency sparkle. COLAPSO lets me do that within one instrument, and I really enjoyed hearing how those layers interacted as I played around with them. Pads, drones and sustained sounds are where it became particularly interesting for me, and I’ve already used it in a couple of tracks

Some presets are delicately balanced, and a few adjustments can lose what attracted me in the first place. That could be frustrating, especially before I’d worked out how to hear what each oscillator was doing. The Push setup helped considerably, and once I stopped expecting to know exactly where I was going, I started enjoying myself much more.

COLAPSO runs on macOS and Windows as a VST, VST3 or AU plugin, or as a standalone app. It costs €89, or €8.90 a month through Imaginando’s rent-to-own scheme, and the demo has no time limit. It adds a short burst of noise every minute and won’t save patches, but that still leaves plenty of time to find out whether its way of working suits you.

I’m used to having a sound in my head and working out how to make it. With COLAPSO, I’ve often found the sound first and then realised I wanted it in the track. It sounds great, and it’s got me playing around in a way I don’t always make time for. I’m glad I stuck with it.

Fact box

Item	Detail
Product	COLAPSO atomic synthesiser
Developer	Imaginando, Braga, Portugal
Type	Additive synthesiser: 22 elements, 422 measured emission lines
Engine	Up to 8 voices; three oscillators per voice, up to 16 partials each; 9 filter circuits; four drawable LFOs and four drawable envelopes
Formats	VST, VST3, AU and standalone
Requirements	macOS 13 or later (Apple Silicon native); Windows 10 or later, 64-bit
Price	€89 one-off, or €8.90 a month rent-to-own; COLAPSO, DRC and FRMS bundle €189
Demo	No time limit; short noise burst every 60 seconds, saving disabled
Released	October 2026
Tested with	[DAW and version, Push 3, operating system, length of testing]

Verdict

COLAPSO asks you to listen and explore rather than program towards a sound you already have in mind, and its terminology takes time to learn. Stick with it and it becomes a distinctive source of pads, drones and slowly evolving textures that are hard to get from conventional synths.

For

• Distinctive, evolving pads and drones
• Three oscillators make it possible to build a layered pad in one instance
• Responds well to hands-on control from Push 3

Against

• The physics-based terminology takes time to learn
• Some presets are delicately balanced and easy to lose
• Hard to hear each oscillator’s contribution without muting the others

Find out more at https://www.imaginando.pt/products/colapso-atomic-synthesizer

Related