See how your vocal tone spreads across frequencies: real-time FFT bars and a dynamics view from the same mic pipeline as pitch. Useful for noticing breath noise, sibilance, and uneven colour between registers — all in the browser, no install.

Spectrum from your mic — breath, body, and sibilance

Taller bars show where energy concentrates; use it to balance bright and dark qualities or to check if consonants are popping too hard in the mic.

Dynamics history for phrases and long tones

After you record or during playback, review how overall level moves through a line — helpful for matching soft verses to controlled belts or for breath planning.

How to Use Tone Spectrum (for singers)

This view shows level and spectral energy from your voice — dynamics (loud/soft) and which frequency regions carry energy at each moment. It complements the vocal pitch graph for a fuller picture of how you sound.

Live mode (spectrum bars)

Each vertical bar is a frequency bin from the current FFT frame. Taller bars mean more energy in that band.
The display is symmetric left/right for readability. Use it to spot breath noise, sibilance, plosives, or uneven tone across the spectrum.
Bars update continuously while the mic is on and analysis is running.

History mode (time strip)

After you have recorded—or during playback—a timeline view can show how overall level (RMS-style) evolved across the take.
This complements the spectrum view: one shows “what frequencies,” the other shows “how loud over time.”

Controls

There is no separate gain slider on this page: use the Controller strip for microphone on/off, monitor level (volume icon), and playback; use the plot settings bar for pitch detection sensitivity.
Raise pitch sensitivity if the graph looks empty; lower it if the trace is too noisy from room tone.
If you see only a placeholder message, enable the microphone in the browser and tap the mic button again (mobile Safari often needs a user gesture to start audio).

Vocal practice ideas

Compare “bright” vs “dark” vowels and watch how energy shifts in the spectrum.
Watch levels on long tones to keep steady breath support through the phrase.
Use playback mode to see dynamics on a line you already recorded.

Vocal Tone Spectrum — Energy & Dynamics from Your Mic