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.