SoundMess Lab support
SoundMess Lab is a careful listening tool, and the manual covers every part of it. If a reading looks wrong or something isn't working, email is the fastest way to reach me. Your device model, the iOS version, the SoundMess Lab version (Settings, at the bottom) and the steps to reproduce help a lot, and screenshots even more.
Write to zhi@nonoaudio.com. I read everything.
Tell me your device and the iOS version.
Read the manualTroubleshootingPrivacy policySoundMess Lab page
Are the readings absolute SPL?
Close, not exact. Without calibration the absolute level can be several dB off, and the lowest and highest bands are less reliable than the mid-band. With Pro you can trim the level against a 94 dB reference tone or load an external measurement mic's .txt / .frd calibration file, and on supported models Pro also applies a built-in device curve. SoundMess Lab is not a substitute for a calibrated measurement microphone.
Why does RT60 only measure some bands?
When sound comes out of the iPhone's own speaker, it can't push enough level outside the mids for a decay to be measured, so SoundMess Lab measures the four bands it can drive cleanly, 500 Hz to 4 kHz. Connect a Bluetooth speaker, a wired speaker or AirPlay to get all eight bands from 63 Hz to 8 kHz. If it guessed the route wrong, use Force mode on the RT60 screen.
How do I restore my purchase on a new device?
Tap any locked feature (the RT60 hourglass, for example) to open SoundMess Lab Pro, then tap Restore purchases, signed in with the same Apple Account. Pro is a one-time purchase and supports Family Sharing.
Does SoundMess Lab work offline?
Yes. Everything is measured and stored on the device, with no account, analytics or cloud. The only connection is Apple's own, for the in-app purchase.
How do I compare two measurements?
Open Recordings, tap Compare, choose two RTA or two FFT recordings and tap Compare selected. SoundMess Lab overlays both spectra and lists the largest differences. You can also mark a recording as the baseline and use Compare to baseline from another recording of the same type. Spectrogram recordings can't be compared yet.
Restore purchases
SoundMess Lab Pro is tied to your Apple Account, not to a SoundMess account (there isn't one). On a new device, or after reinstalling, tap any feature with a lock to open the Pro sheet and tap Restore purchases. Recordings and calibration settings stay on the device. There's no SoundMess sync, so they only come across if you restore the new device from a backup.
More questions
Recording, export, calibration and what to check when the microphone or a reading misbehaves are all in the manual: Questions. How SoundMess Lab handles your data is in the privacy policy.