MP3 Volume Extractor

Upload an MP3, extract short‑term volume (RMS or dBFS), and download the results as a .txt file.

Audio file

Decoded in the browser — no server upload.

FPS

Frames per second (use instead of window/ms)

Output

Colour source Pitch range (Hz) — used when Colour source = Pitch

Colour hue range (H in HSL)

Start: 200°

End: 40°

Colours are generated as hex from HSL (H interpolated between start/end). Saturation=80% Lightness=50% (fixed).

Highlight large changes

Threshold (delta): 0.20

When Colour source = Pitch, threshold compares normalized pitch changes; otherwise it compares normalized RMS changes.

Colour preview (first frames)

Download volume .txt Download colors .txt

Preview (first 200 lines)

No data yet.

Volume file: one numeric value per line (no timestamps). Colours file: hex color per line (one per frame). Highlight colour marks large frame‑to‑frame changes.