What Sound Looks Like [video]
Product review video with affiliate links, not a Show HN project.

Open-source acoustic camera built on a Pico 2W visualizes sound waves directly.
Audio engineers and hardware hobbyists
SoundCam · NoiseSee · Acoustic Camera
Product review video with affiliate links, not a Show HN project.
YouTube video review, not a shipped project with code or tooling.
Paste your dx/dt and dy/dt, tweak parameters, and the page will draw vector fields, nullclines, trajectories (Euler or RK4), and even compute eigenvalues and a Poincaré index at clicked points — all in the browser. Not groundbreaking compared to MATLAB/pplane or Python notebooks, but packing Jacobian eigenanalysis, nullcline overlays and clickable stability diagnostics into a lightweight client-side tool is genuinely handy for teaching and quick exploration.
24KB schema-aware JSON form builder with zero dependencies, but JSON-Schemas UI and Formik already dominate.
Turning CLI agent logs into a visual graph with sound effects is a clever way to debug thinking.
Pretty terminal theme with audio chimes, but purely cosmetic enhancement for Claude Code.