Nyquist captures system audio from any app on your Mac — Spotify, Apple Music, YouTube, games — and visualises the full frequency spectrum in real time. The design is clean and minimal — inspired by Winamp’s visualiser and NASA control room displays. ∙ System audio capture from any app ∙ Metal-rendered — GPU-accelerated, minimal CPU, 120 FPS ∙ Mini player — always-on-top strip, drag anywhere ∙ Spotify + Apple Music now playing + controls