Sound Field Check

Launch App Fullscreen
Cloud Synced • Offline Capable

The Ultimate Toolkit for System Techs.

A highly optimized, native web-application designed to map, tune, align, and verify professional live audio environments.

Everything you need. Nothing you don’t.

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SPL Meter & RTA

A professional-grade acoustic measurement suite tracking absolute minimum, maximum, and average dB.

  • Standard A, C, and Z weighting filters
  • Dual-Graph: SPL History & 20Hz-20kHz RTA
  • Hardware Auto-Calibration matching
  • Session compliance logger
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2D Coverage Map

Build a scale model of the venue and drop virtual speakers to predict coverage and interference.

  • Built-in Library & Custom Box Creator
  • Subwoofer Polar Patterns (Omni/Cardioid)
  • Phase Overlap Detection mapping
  • Canvas Tape Measure (Distance & Delay)
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Horn Protractor

A quick-reference visualizer to see exactly how wide a speaker’s coverage will be at physical distances.

  • Interactive dual-arm drag canvas
  • Industry standard presets (40° to 140°)
  • Instant Width Calculator in Meters/Feet
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AR Tools & Generators

A utility belt of acoustic math, WebXR spatial mapping, and built-in signal generation.

  • AR Stage Mapper: Drop virtual pins in 3D
  • Sine & Pink Noise Signal Generator
  • Delay & Wavelength Calculators
  • Team Cloud Sync & Exporting

In-Depth How-To Guide.

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1. Designing a Coverage Map

Open the Coverage Map. Use the bottom toolbar to adjust the grid scale (px/m) to match your venue size. Go to the Library tab and tap a speaker to drop it onto the grid.

> Drag to move a speaker.
> Double-tap a speaker to rotate it 15°.
> Tap ‘Overlap’ to reveal phase-cancellation zones.
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2. Aligning Delay Towers with AR

Arrive at the venue and open the Tools > AR Stage Mapper. Ensure you have good lighting so the camera can track the floor. The app uses WebXR to map your physical environment.

> Stand at your Main PA. Tap ‘Set Stage Center’.
> Walk physically to your Delay Tower location.
> Tap ‘Mark Point’. The app outputs exact distance & ms delay.
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3. Calibrating the SPL Meter

Mobile microphones are inherently uncalibrated. To get true dB readings, use a dedicated hardware SPL meter to set an offset.

> Go to Tools -> Play Pink Noise.
> Place hardware SPL meter next to your phone.
> Go to SPL -> Auto-Cal. Enter the hardware dB reading & Lock In.
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4. Analyzing Frequencies (RTA)

The Real-Time Analyzer (RTA) helps you ring out a room and find feedback frequencies.

> Press ‘Start’ on the SPL tab.
> Select ‘RTA’ or ‘MERGE’ on the graph toggles.
> The graph plots a logarithmic curve from 20Hz to 20kHz.

Frequently Asked Questions.

Does this require an internet connection?
No. The core acoustic engines (SPL, RTA, Signal Generator, and Protractor) execute entirely on your device. Once the page is loaded, it works 100% offline in basements, warehouses, or remote festival fields.
How does Cloud Sync work for Teams?
If you are logged into your user account, clicking Save Layout in the Tools tab will automatically sync your Coverage Map, Custom Speakers, and Scale settings to our secure cloud database. Any team member logged into that account on site can hit Load Layout to instantly pull up your blueprint. If you are a guest, data is saved locally to your device browser.
Why won’t the AR Tape Measure or Microphone load?
Modern browsers enforce strict privacy rules. The app will ask for Microphone and Camera permissions on first boot. Please note that Apple currently restricts WebXR on iOS Safari, so the AR feature requires Android (Chrome/Edge/Samsung) or a compatible headset.
How accurate is the SPL Meter?
The software math (A/C/Z Weighting filters and FFT analysis) is mathematically precise. However, the hardware is the bottleneck. Cell phone microphones have built-in limiters that will usually flatline around 95dB–100dB to protect the circuitry. Always use the Auto-Cal wizard with an external reference meter for accurate baseline readings.
What does the “Overlap” button actually show?
When two identical audio sources cover the exact same physical space, they create Comb Filtering (phase cancellations and additions). The Overlap toggle highlights grid areas in red where the primary throw distances of two or more directional speakers intersect, warning you of potential acoustic interference.

Under the Hood.

Pure HTML5 / CSS3 / ES6 JS
Zero External Dependencies
60fps Canvas API Rendering
WebXR Augmented Reality
MediaDevices AudioContext
Secure Cloud WP API Sync