Audio Spectrum Analyzer
Inspect the frequency content of a representative center window without uploading your audio.
How the analysis works
Build 110 averages decoded channels to mono, takes one center window, applies a Hann window and computes a radix-2 FFT. Larger FFT sizes give narrower frequency bins but represent a longer slice of time.
How to interpret it
The strongest FFT bin can help identify a steady tone or dominant frequency region. Musical and noisy signals spread energy across many bins, so one peak is not a complete description of tonal balance.
Limitations
This is a single-window utility spectrum, not a calibrated real-time analyzer, spectrogram, psychoacoustic loudness meter, LUFS meter, true-peak meter or mastering decision system. The displayed dBFS-like FFT magnitude depends on windowing and the selected slice.
Privacy
Decoding and FFT analysis stay in the browser. No export or server upload is required.