Quick Start Guide

Last Update: 1/4/21

Applications Manual for Sound Recording with iOS

This table shows our test results for the Røde App. Note the Apps meter is not calibrated, so we indicate the playback level

by noting the lit LEDs: red, yellow and green.

Now you can see how the Apps meter readings correspond to the digital input signal level and the phone’s analog output.

We’re looking for linearity, meaning a 50% decrease in the generator mV signal level should correspond to a 6dB decrease

in the output level. You might notice some slight discrepancies at the top of the scale as the level approaches 0dB. That’s

the reason you want to keep your maximum recordings levels below -6dB or lower to avoid any distortion. Don’t worry

about noise as you would with analog recording. This is digital. The noise floor is more than 90dB below your recording

level. For practical purposes, we can say there is no noise!

Function

Generator

Sonic USB

Interface

analog

digital

analog

Voltmeter

calibrated

1Volt rms =0dB

iPhone

Android

App

Røde

scale green green green green yellow red red

scale marking na na na na na na na

generator mV rms 5 10 13 20 50 80 160

calculated level in dB -30.1 -24.1 -21.8 -18.1 -10.1 -6.0 0

PB level (analog) -32 -24 -18 na -12 -8 -4

reference acoustic level 94dB SPL 114dB SPL