Audio Spectrum Analyzer

The tool accepts raw audio input (live stream or uploaded file) and computes its frequency spectrum using a fast Fourier transform (FFT). It outputs a spectrum magnitude vector across frequency bins and supports linear or decibel magnitude. Users can adjust FFT size, sample rate, and window type to trade resolution for smoothness. The tool is browser-based and requires no installation, enabling quick setup for analysis workflows.
Conceptually, audio is divided into overlapping frames. Each frame is windowed (Hann, Hamming, Blackman), transformed with FFT, and the magnitude is placed into a frequency bin, producing a spectrum over the audible range. The output can be plotted, filtered, or exported as CSV or JSON for post-processing. It handles mono and stereo channels by selecting a primary channel or providing per-channel data.
Audience and value: musicians for tonal balance, producers for frequency shaping, researchers for spectral research, educators for Fourier teaching. Unique differentiators: no software install, browser-based computation, adjustable FFT and windowing, exportable data, and an emphasis on speed and accessibility for quick decision making.
Use cases include real-time monitoring of a mix, offline analysis of a song section, vocal formant inspection, instrument tuning, and academic demonstrations.