Audio Spectrum Pro
PRO AUDIO TOOLKIT  //  iOS 16.2+

See the sound.
Tame the room.

A full measurement suite for live sound engineers — spectrum analyzer, chromatic tuner, oscilloscope, loudness meter, test-signal generator and RT60 reverberation analysis. One black screen, built for the stage.

Coming soon to the
App Store Launching on iOS 16.2+ · iPhone & iPad
6instruments
50 Hz–16 kHzreal-time FFT
±0.01¢tuner precision
RT60 · T20room acoustics
Audio Spectrum Pro spectrum analyzer with EQ recommendations
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The toolkit

One iPhone. A full measurement rack.

Six instruments a live engineer actually reaches for — each tuned for the stage, the monitor world, and the room.

01 · Spectrum analyzer

Find the problem frequency before it finds you.

Real-time spectrum from 50 Hz to 16 kHz on a logarithmic scale. Automatic peak detection highlights trouble instantly, and the EQ Suggestions panel tells you which band to cut — and by how many dB — before feedback ever happens.

  • 50 Hz – 16 kHz logarithmic, real-time FFT
  • Auto peak detection with frequency readout
  • EQ Suggestions — band & cut in decibels
Spectrum analyzer with EQ recommendations
02 · Chromatic tuner

Hundredths-of-a-cent pitch, for any instrument.

High-precision detection with a clean in-tune indicator. Presets for guitar, bass, violin, viola, cello, ukulele, mandolin, banjo and a full chromatic mode — plus adjustable A4 reference, capo support and a noise gate that rejects bleed from the PA.

  • ±0.01 cent pitch resolution
  • 9 instrument presets + chromatic
  • Adjustable A4, capo & noise gate
Chromatic tuner with piano keyboard
03 · Oscilloscope

The waveform, the moment it sounds wrong.

A real-time waveform display for signal-integrity checks, phase inspection and clipping detection. The first thing you reach for when a channel sounds off — see the shape of the signal, not just its level.

  • Live waveform rendering
  • Clipping & phase inspection
  • Signal-integrity at a glance
Oscilloscope waveform
04 · Loudness meter

RMS and true-peak, side by side.

Simultaneous RMS and true-peak readout with a scrolling history graph. Watch your average level and catch peak spikes before they slam your limiters — 120 frames of history keep the trend in view.

  • RMS + true peak simultaneously
  • 120-frame scrolling history
  • Limiter-safe spike awareness
RMS−12.0 dB
TRUE PEAK−3.0 dB
HISTORY120 f
05 · Test-signal generator

Pink, white, sweep or tone — through the speaker, while the mic listens.

Pink noise, white noise, a logarithmic sine sweep (20 Hz → 20 kHz) or a fixed tone from 50 Hz to 8 kHz. Play out loud while the analyzer keeps measuring — tune PA systems, ring out monitor wedges and find room resonances without a separate generator.

  • Pink / white noise
  • Log sine sweep 20 Hz → 20 kHz
  • Fixed tone 50 Hz – 8 kHz
Test-signal generator, sine sweep
06 · RT60 reverberation

Size up a room's acoustics in seconds.

Tap start, make an impulse — a clap, a click, or a sine sweep — and the app records the decay, computes T20 and extrapolates RT60. Know instantly whether the room is working for you or against you.

  • Impulse capture — clap, click or sweep
  • T20 → RT60 extrapolation
  • Plain-language verdict (dry → reverberant)
RT60 reverberation decay curve
Built for the field

Designed for the moment the show starts.

Gain

Volume-button gain

Adjust mic gain with the hardware volume buttons — one hand, while the other stays on the console.

Dark

Stage-dark interface

Fully black UI that reads under stage lighting and never kills your night vision.

Land

Landscape ready

Lay it flat on the meter bridge or a side table — full landscape support.

i18n

Three languages

English, Russian and Ukrainian interface, switchable on the fly.

Get it

The measurement rack that fits in a pocket.

No subscriptions, no accounts, no audio leaving your device. Just the instruments — ready when the room is.

Coming soon to the
App Store