Two products, and a lot you can try for free.
Same harmony engine as the API, pointed at practice rooms and writing desks instead of build systems. These two are the ones we are building as products. The Elk Stomp run is a measurement, not a product, and everything you can simply open and use starts at demo.thiri.ai.
Run the Changes
A practice tool that holds you to the chart. It generates the changes, voices them correctly, and keeps the harmony honest while you play over it — so what you hear in the room is what the tune actually does.
- LicenceOne-time, yours
- EngineDeterministic voicings
- ForPlayers, teachers, studios
$99.99
Studio licence: talk to us.
Composer C
The writing surface. Sketch a progression, reharmonise it, hear it voiced properly, and keep the result because it will be the same result tomorrow.
- LicenceMonthly
- Wherecomposer.thiri.ai
- ForWriters and arrangers
$19/mo
Everything else you can play
Most of the engine is free and needs no account. KORUS answers your singing voice in five parts, in a browser, with your own formants intact. HRN SXTN does the same for a horn — a lab build, not for sale. The arpeggiator, the conductor and the full studio rack are open to anyone. They all start in one place: demo.thiri.ai.
If you build instead of play
The same engine is a hosted API and MCP. Mint a key, then call it. Developers · MCP setup · Get a key · Licensing