Audio Lab Support

Audio Lab is an iPhone app with a real-time spectrum analyzer (RTA), an FFT analyzer, a sound level meter (SPL) and a signal generator.

Contact

For questions, bug reports or feature requests, write to [email protected]. Please include your iPhone model, iOS version, the app version and what you were measuring.

Common questions

The level is shown as an estimate. The built-in microphone is not calibrated, so the app shows an estimated dB SPL. For readings you can compare with a sound level meter, enter a calibration offset in Settings or calibrate with an acoustic calibrator.

The readings jump when I plug in a headset. Each input device has its own calibration offset. Set it again for the new device.

The microphone does not work. Open iOS Settings, then Audio Lab, and turn on Microphone.