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Audio Frequency Balancer

See how your sound’s energy is spread across sub, bass, mid, treble and air, time-averaged, and how each band sits relative to a neutral balance — so you can spot what’s heavy or thin.

Relative balance, not calibrated. "Neutral" here means equal energy per octave (a pink-noise reference), which is a rough musical guideline — not a rule. Readings come from an uncalibrated mic and include your room/speakers, so use this to compare bands and spot tendencies, not as an absolute target. Play a representative passage for a few seconds. Nothing is recorded.

Idle — press Start.

Bars show each band’s deviation from your average balance (centre = neutral). Right = heavy, left = light.

How Balance Is Judged

The signal is split into five wide bands — Sub (20–60 Hz), Bass (60–250 Hz), Mid (250 Hz–2 kHz), Treble (2–8 kHz) and Air (8–20 kHz). For each, the analyzer time-averages the energy and divides by the band’s width in octaves, giving energy per octave. That’s the fair way to compare bands of different widths: a spectrum with equal energy per octave — the classic "pink" balance many mixes aim near — reads flat here.

Each band is then compared to the average of all bands, and the difference in dB is its deviation: a band well above the average is "heavy," well below is "light." The bars centre on neutral, extending right for heavy and left for light, with a rating and a gentle EQ hint. Because it’s a relative, uncalibrated mic reading, treat it as a guide to tendencies, not a verdict.

Frequently Asked Questions

What is a "neutral" balance?
Here it’s equal energy per octave (a pink-noise spectrum), a common reference for a balanced, natural-sounding mix. It’s a guideline, not a rule — genres and tastes vary a lot.
Why divide by octaves instead of just summing?
Wider bands contain more raw energy simply because they’re wider. Dividing by the band’s width in octaves makes the comparison fair, so a pink (equal-energy-per-octave) spectrum reads flat across all bands.
Should I play something for a while?
Yes — the balance is time-averaged, so play a representative passage for several seconds to let it settle. Use Reset to start a fresh average for a new source.
Can I trust the exact dB deviations?
Treat them as relative. An uncalibrated microphone and your room/speakers colour the result, so the shape (which bands are heavy or light) is more meaningful than the precise numbers.
Is my audio recorded?
No. The signal is analyzed in real time and is never recorded, saved, or transmitted. The microphone is released when you press Stop or close the tab.