Spectrum — Multi-Modal Reception

The Spectrum page uses your device's built-in sensors. Each permission is optional — the modality it powers simply stays offline when denied. Nothing is uploaded.

• Microphone? Unknown

  Request⟲
  Why we ask: Sample sonic and ultrasonic waves in real time.
  Feeds the FFT analyser that renders the spectrogram and detects near-ultrasonic beacons around 19 kHz. Audio stays on your device — nothing is uploaded or recorded to disk from this page.
• Camera? Unknown

  Request⟲
  Why we ask: Measure photonic activity and near-IR flicker.
  Reads per-frame luminance and red-channel intensity to surface flicker (e.g. TV remotes emitting near-IR that phone sensors partially see). Frames are analysed in memory and immediately discarded.
• Motion & orientation? Unknown

  Request⟲
  Why we ask: Detect geomagnetic heading and device tilt.
  Uses the compass/accelerometer to expose local field changes as a live heading. iOS Safari requires an explicit tap to unlock motion — this button issues that request.
• Location? Unknown

  Request⟲
  Why we ask: Show GNSS lock quality and accuracy.
  Uses your device's GPS/GNSS to display latitude, longitude and accuracy. Coordinates are shown only on this page and are not sent anywhere.

Pause every modality — or a single band — to cut CPU and battery use without touching your thresholds. Paused bands stay recorded across a refresh and can be resumed to exactly what was running.

• runningSonic
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• runningUltrasonic
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• runningPhotonic
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• runningAmbient
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• runningMagnetic
  ⏸■
• runningNetwork
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• runningGNSS
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Every reading on this page is captured, analysed, and shown in your browser. Nothing is uploaded, streamed, or logged to any server — the microphone, camera, motion, and location data stay on this device.

Each active loop reports its ticks to a shared scheduler. Rows show the target FPS applied (native, low-power throttle, or event-driven), the measured FPS over the last second, and how long ago the last tick fired.

Choose whether Spectrum session logs and preferences are stored in this browser, kept only in memory for exports, or never stored at all. This setting itself is remembered so your choice survives reloads.

Samples live noise, motion, light, and network activity for a few seconds, then recommends the best built-in preset for your current surroundings.

Save the current gains, thresholds, and enabled bands as a named preset for an environment (e.g. quiet room, moving car, loud venue), then load it back instantly. Presets are stored on this device.

Records every band's normalized reading and detail string once per second, plus activation events and decoded messages, so you can share or debug what your device saw. All data stays on this device until you export it.

Record readings at 1 Hz, then scrub the timeline to review what every band was measuring at any instant. Events (activations, decodes) that occurred near the cursor appear on the right.

Start recording to build a timeline you can scrub.

Download the current spectrogram view plus every band value and threshold as an image or a JSON file. Device and timestamp metadata are embedded for traceability; everything is generated on-device.

Hold the device still in your current environment for 5s. We'll measure the ambient baseline and suggest slider values that surface signals without triggering on noise.

All engaged modalities look nominal. Start more sensors above to include them here.

• Sonic (mic RMS)

  inactive

  Not engaged yet — start the modality to diagnose.

• Ultrasonic (>18 kHz)

  inactive

  Not engaged yet — start the modality to diagnose.

• Photonic (camera flicker)

  inactive

  Not engaged yet — start the modality to diagnose.

• Ambient light

  unsupported

  Sensor not exposed by this device.

• Geomagnetic

  unsupported

  Sensor not exposed by this device.

• Network EM

  unsupported

  Sensor not exposed by this device.

• GNSS positional

  unsupported

  Sensor not exposed by this device.

When the tab is hidden or the app is backgrounded, the microphone and camera loops are stopped to save CPU and battery. Threshold sliders, presets, and calibration are left unchanged. Sensors that were running resume automatically when you return.