Simon Willison prompted Claude Opus 5.5 to create game music in a text format, and the model returned a working browser player with six original tracks. The output mimics the style of the Monkey Island soundtrack, using a synthesizer to render a piano-roll visualisation and audio directly in the browser. Each track includes metadata such as tempo, time signature, and voice count, alongside an editable score view.
This experiment suggests that recent text models may have gained a specific capability to generate competent music without requiring separate training. Willison notes that this ability appears similar to the sudden emergence of 3D graphics in earlier models, though further testing is needed to confirm if this is a new development or a latent skill. The tool demonstrates that complex interactive media can now be produced through simple text instructions.
- Six original adventure-game tracks generated in plain text
- Browser-based synthesizer plays audio without external files
- Score view allows users to edit notes and mute specific voices