Nyquist – Real-time spectrum analyser capturing system audio on macOS

Summary: Nyquist captures system audio from any macOS app and visualises the full frequency spectrum in real time using GPU-accelerated Metal rendering at 120 FPS. It features an 8192-point FFT with sub-bin interpolation and a mini player showing now playing info and playback controls for Spotify and Apple Music.

What it does

Nyquist captures audio output from any Mac app and displays a clean, minimal real-time spectrum analyser with high frame rates and low CPU usage. It includes a draggable mini player with playback controls and track info.

Who it's for

It is designed for macOS users who want to visualise the audio spectrum of music or sounds playing directly from their system.

Why it matters

Nyquist solves the problem of visualising system audio without using a microphone or complex software, providing accurate real-time frequency analysis.