How he built his music animation system with MIDI, Gemini 4 Argon and Antigravity
alexanderchen · x · 2026-10-24
alexanderchen details the workflow behind his piano animation: he performed on a MIDI keyboard, then used Gemini 4 Argon plus Antigravity to analyze the MIDI performance and generate character movements, iterating heavily on interaction design.
A key decision: the system deliberately isn't real-time, which lets animations look ahead to upcoming musical events so movements anticipate the melody.
Related event: Developer Turns Piano Performance Into Animation With Gemini 4 Argon(2 posts)→
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