Harmonic Composition Assistant

Sympathia

Give each synth a reason to exist.

When your synths begin to listen to each other. Sympathia assigns a harmonic role — mode, exotic scale, or negative harmony — to each instrument in your rig. One root key. Every voice, finally in agreement.

Process

How it works

01

Choose your root key

Set a single tonic. Sympathia uses this as the centre of gravity for every harmonic decision across your entire rig.

02

Assign each synth a harmonic role

Give each instrument its own mode or scale — Lydian, Phrygian, Hirajoshi — all mathematically derived from your root. No guesswork.

03

Play — your synths finally agree

Every note suggestion across every synth is in harmonic coherence. Layer textures, counter-melodies, and colour without the theory overhead.

Features

Built for the way you actually work

Harmonic Role Assignment

One root. Every role covered. Pick your key and Sympathia distributes harmonic responsibility across your synths — dominant fifth here, natural minor there, negative harmony for the one that always sounds wrong in a good way. No theory degree required.

Exotic Scale Library

Beyond major and minor. Sympathia includes Ukrainian Dorian, Japanese Hirajoshi, Spanish Phrygian, and a growing collection of world scales — all transposed to your root key and ready to assign. If you've ever wanted your second oscillator to sound like it's from a different continent, now it can be.

Per-Synth Setup Cards

Every synth gets its brief. Each instrument in your rig receives a clean, readable setup card: its harmonic role, its assigned scale, its MIDI channel, and the specific notes it should prioritise. No guessing, no scribbled Post-its on the back of the rack.

Who it's for

Made for serious synth players

If you own more synths than you have patch cables for — and you know exactly which ones you reach for first.

If you've ever spent 40 minutes making your Juno and your Hydrasynth agree — and still weren't sure they were actually in the same key.

If the word "Dorian" means something to you — and you want your whole rig to speak the same harmonic language, without opening a theory textbook.

Pricing

Simple pricing. No subscriptions.

Free
£0
For trying it out. No card required.
  • Up to 3 synthesisers
  • Standard diatonic modes
  • MIDI note display
  • Root key selector
  • Exotic scale library
  • Save & export
  • Unlimited synths
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Early access

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