Skeletune

Spectrum Analyzer

See the average frequency balance of a whole file as an ink density plate.

Max 100 MB · max 15 minutes · MP3, WAV, M4A, FLAC, OGG

The file is decoded and measured inside your browser.

About this tool

This free online spectrum analyzer averages the FFT of a whole audio file and shows where energy lives across the frequency range, so you can check the frequency balance of a mix on a monochrome density plate and a single ink curve instead of a saturated heatmap.

The FFT runs in your browser on the file you already loaded, so opening this tool after SCAN costs nothing. It is a static reading of a file; there is no live microphone mode.

How it works

  1. 01

    Load audio

    Drop a file and the average spectrum is measured locally.

  2. 02

    Read density

    Darker marks mean more average energy in that frequency band.

  3. 03

    Check bands

    Use the peak, centroid and low/mid/high energy shares to summarise the balance.

Questions

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