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TrueSound — Spectral Image Analyzer

Choose what to share Opera Tab Application Window Your Entire Screen 1 Click this tab Your screen preview appears here 2 Select your screen 🔊 Also share system audio 3 Share Cancel 4
⚠ No signal — make sure you selected Entire Screen and checked "Also share system audio"
Left Right
PEAK —
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STEREO = left and right channels carry different audio — true stereo content.

DUAL MONO = both channels are identical — mono duplicated to L+R.

MONO = single channel detected.

Δ dB = average level difference between L and R. Higher = wider stereo image.
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MONO

Frequency Bands

Sub20–60—
Bass60–250—
Low Mid250–500—
Mid500–2k—
High Mid2k–4k—
Presence4k–8k—
Air8k–20k—

Spectrum

HF Boost exaggerates 10k+ for visibility. 0% = true levels. A flat/square top on the HF curve indicates we are boosting a VERY low signal for viewing.

About

Read-only — audio passes through untouched. Quiet signals are held longer so you can see what frequencies are present.

Stereo L/R: Browser tab capture is often mono — the L/R toggle will show this. For true stereo, use system audio capture (Windows: Chrome + systemAudio, macOS: Chrome 141+ on macOS 14.2+, or use BlackHole/Loopback). DAW plugin analyzers like SSL X-EQ 2 get stereo directly from the audio engine.

Tone Generator

440 Hz
⚠ Use low volume. High frequencies at loud levels can damage hearing and speakers.
IDLE
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