Very cool. Inspired by the post, I gave the following prompt to Gemini 2.5 Pro with the temperature set to 0.35:<p>“Create a music synthesizer that I can run in my browser. Give it original functionality, with buttons and other controls that create pleasing but unexpected sounds, melodies, rhythmic patterns, etc. as well as various sliders and dials that can be used to modify the sounds and patterns.”<p>Here is the result:<p><a href="https://www.gally.net/temp/202540326geminisynthesizer/index.html" rel="nofollow">https://www.gally.net/temp/202540326geminisynthesizer/index....</a><p>Here’s an excerpt from the reasoning trace:<p>> Brainstorm "Original" and "Unexpected" Functionality:<p>> Standard Synths: Oscillators (sine, square, saw, triangle), filters (lowpass, highpass), envelopes (ADSR), LFOs. These are common. How to make them unexpected?<p>> Generative Aspects: Instead of just playing notes the user clicks, what if the synth generates patterns?<p>> Melody Generation: Use algorithms like random walks, cellular automata, or simple probability rules.<p>> Rhythm Generation: Euclidean rhythms, probabilistic triggers, evolving patterns. ...<p>> Interface Concept: How can the controls themselves be part of the "unexpected" experience? Buttons that trigger complex events, sliders with non-linear responses, dials that control abstract concepts.