Support

Thanks for using SoundMess Lab. The fastest way to reach us is email.

Contact

When reporting a bug, please include your iPhone or iPad model, iOS version, SoundMess Lab version, and — if possible — the steps to reproduce. Screenshots help a lot.

Frequently asked

Are the readings absolute SPL?

Without calibration, the iPhone microphone is close to ±2–3 dB across the mid-band and gets noisier at the extremes. SoundMess Lab ships with device-specific compensation curves for recent iPhones and iPads, and you can tighten accuracy further by running the reference-tone wizard or importing a third-party calibration file (.txt / .frd) from an external measurement microphone.

Why is RT60 using only a subset of bands?

When the output route is the built-in iPhone speaker, the transducer can't push enough SPL below ~300 Hz or above ~6 kHz for a decay measurement to be meaningful. SoundMess Lab detects this and quietly reduces to the bands it can drive cleanly. Connect a Bluetooth speaker, wired speaker, or use AirPlay to get the full 63 Hz – 8 kHz set.

Recording saved a 0-byte file?

This usually means the recording was interrupted (incoming call, Siri, or the app was backgrounded mid-write) before the WAV header could be patched. Current versions finalise on interruption and present an alert if any frames were missed. If you still see a zero-byte file, please email us the steps.

How do I restore a purchase on a new device?

Open SoundMess Lab → tap the Settings gear → Upgrade to Pro → Restore Purchases. Your App Store account needs to be signed in to iCloud / App Store on the new device. The Lifetime purchase is Family-Shareable.

Does SoundMess Lab work offline?

Yes — everything runs locally. The app makes no network requests of its own.

Can I export data?

Pro users can export PNG images, CSV band/FFT values, a PDF report, and WAV recordings via the share sheet.

Troubleshooting

If the microphone icon is missing or the readout stays blank, check Settings → SoundMess Lab → Microphone.
If readings look 10–20 dB off, try Settings → Calibration → Reference Tone with a calibrator or any known-SPL source.
If the signal generator plays through the ear receiver instead of the speaker, disconnect any Bluetooth audio device and try again.
If the app becomes unresponsive after a long background period, relaunching restores the audio session cleanly.