Josh Woodward shows Gemini 4 Argon building a synthesizer from a 24-word prompt

Google's Josh Woodward shows Gemini 4 Argon building a custom synthesizer from a 24-word prompt, according to a post on X. The synthesizer turns galloping horses, rippling water and hand movements into music.

The only source is Woodward's X post, which names the demo but gives no further details on how the synthesizer works or how it performs.