An audio spectrum / level view for singers: live waveform-style bars and spectrum energy from the same short window as the pitch tool, plus a dynamics strip after you record. Use it as a mic check and to read breath, sibilance, and phrase energy — all processing stays in your browser; no install.

Level & waveform — is the mic hearing you?

Tall bars in the live view mean a stronger signal in that slice of the current buffer—use it to check input level before you care about intonation, notice silence vs. sound at a glance, and catch obvious clipping or near-silence that would make the pitch graph unreliable.

Dynamics over time — phrases, breath, and balance

When you record, level history is captured over the take; on playback, the strip summarizes how energy (RMS-style) moves with time. That helps you compare a quiet verse to a full chorus, long-tone steadiness, or how you taper the ends of lines.

How to use Level, Waveform & Dynamics (for singers)

This page is about what you send into the analysis pipeline: how loud the signal is and how the waveform shape and energy change over a phrase. Pair it with the pitch graph when you want both intonation and an honest picture of input and dynamics in one session.

Live view (centered bar/waveform display)

Each bar reflects sample magnitude in a short time-domain window from your mic, scaled so the current frame is easy to read—taller means stronger signal at that position in the buffer, not a separate “frequency” scale.
The graph is drawn symmetrically around the middle so you can scan level at a glance; use it to confirm the mic is open, the room is quiet enough, and you are not driving the input into obvious distortion on peaks.
The view updates while the analyser is running: keep the mic on from the Controller strip and sing or speak to see the response.

History view (dynamics strip)

After you have recorded, or when you play back, the time strip can show a compressed history of how overall level evolved—useful for phrase shaping, crescendos, and where you back off the voice.
This complements the live view: the bars show a snapshot in time, the strip shows “how loud, over the line you sang.”

Controls

There is no separate gain control on this page. Use the Controller for microphone on/off, monitor level (volume icon), recording, and playback; use the plot settings bar to adjust pitch detection sensitivity, which can indirectly affect when analysis runs.
Raise pitch sensitivity if the pitch or level displays look empty; lower it if the trace is noisy from room tone.
If you only see the placeholder, allow microphone access in the browser and tap the mic again (mobile Safari often needs a user gesture to start audio).

Vocal practice ideas

Sustain a single note: keep the level strip steadier to train even breath support (pair with the pitch line for pitch + energy).
Sing the same phrase quietly and then strongly; compare the dynamics strip to internalize a planned arc before you work with a track.
Record a line, then play it back and watch the strip to see if soft endings or pick-ups are really as quiet as you intend.

Audio Spectrum & Vocal Level — Waveform & Dynamics