Music software, instruments and rooms built out of chord petals

A chord progression explorer where every chord is a petal. Tap a petal to hear it, double-tap to move into that key, long-press to stack sevenths, ninths and thirteenths. Views for the diatonic set, the circle of fifths, relative and parallel keys, tritone substitutions and modal interchange, so the theory is something you can walk around in rather than read about.

Sound comes from built-in Web Audio synths or from SuperCollider's scsynth compiled to WebAssembly. Magenta.js improvises melodies over the changes. MIDI goes out over CoreMIDI and Bluetooth LE to hardware synths and DAWs. The whole app is one HTML file wrapped in a native Swift shell.

• iOS and web
• SuperCollider WASM
• Magenta.js
• BLE and CoreMIDI
• Free, MIDI output unlock

A festival companion built for Outside Lands 2026. When 80,000 phones melt the cell towers, it still finds your crew: group chat, live friend locations on the map and raise-to-AR 3D totems all travel over a Bluetooth LE mesh between phones, with no signal at all.

Won the grand prize at OutsideLLMs, the festival's official hackathon, sponsored by OpenAI. Built with Lindo Akkarach, then shipped as a public TestFlight beta during the festival weekend and on to the App Store. Built on a fork of the public-domain openllmdigitotem mesh; the encrypted location beacons, crew sync, stage overlays and the RealityKit totem view are new.

• iOS
• Swift and RealityKit
• BLE mesh
• Grand prize, OutsideLLMs 2026

Chat with your music gear. Pick the synth, drum machine or pedal you own and ask it questions in plain language: how do I set up a sidechain, what does this button do, why is the arpeggiator not latching. Answers come out of the actual manual instead of a forum thread.

Built with Next.js and deployed on Vercel. Manuals are cached at the model layer so long documents stay fast and cheap to query.

• Web
• Next.js
• LLM over manuals

A listening game for Sound Lab in Q?rius, the education center at the Smithsonian's National Museum of Natural History. Two or three players are songbirds with headphones and arcade-button controllers. Real bird recordings play in their ears: hear a predator and take cover, hear a worm and eat it, hear a mate and answer in the right pitch range. Round two adds city noise, so players have to find the open range, the way urban songbirds do.

I wrote the audio software in C++ on FMOD and did the hardware integration: three screens, three headphone mixes and three Midi Fighter controllers off one Mac Mini. Built with Jimmy Garver, JD Madsen, John Kaufmann and Rebecca Bray. Opened February 2014.

• Museum exhibit
• C++ and FMOD
• Midi Fighter Spectra
• Smithsonian NMNH