Glissa — Expressive Glissando Instrument

Private product. This is proprietary work; the app is private. This page describes the architecture and intent without exposing internal logic.

Touchscreen instruments mostly imitate piano keys — discrete, quantized, expressively flat. Glissa’s signature is the hard, interesting thing: continuous glissando, letting a finger slide between pitches the way a voice or a slide guitar does, in real time, on a phone, with three modes — Keys, Glide, and Auto.

What it demonstrates

• A real-time audio engine with a distinctive expressive feature rather than a keyboard clone.
• An FX rack, instrument morphing, and a sampled-pack path for richer timbres; a two-finger octave pan and an options sheet round out the playing surface.
• A full consumer-app ladder: a Pro suite with local recording, account management, cloud sync, and billing (own-JWT auth + RevenueCat) over a FastAPI + Postgres backend.
• Shipped as a cross-platform standalone build.

Expressive control is what separates a toy from an instrument — and the Pro tier turns that expressiveness into a sustainable product.