Quick Start Guide

Last Update: 1/4/21

Applications Manual for Sound Recording with iOS

-24 -18 -12 -6 3 0dB

While this App has a meter, there is no way to control the audio input level. We’ve calibrated the internal level of the

VR15-USB so 0dB is equal to 120 dB SPL. That is as loud as it gets at a heavily amplified Rock Concert. If you see the meters

hitting Red, then back away. You’re damaging your hearing!

Here is our table showing the audio performance. You can see the linearity is really quite excellent, which means that

changes in the Output Level accurately follow changes in the Input Level.

7. Troubleshooting/FAQ

iOS device does not recognize the SP15

1. Unplug the VR15-USB from your iOS device.

2. Reboot your iOS device.

3. Plug your SP15 back into your iOS device.

4. Relaunch your recording App.

USB Mic Input control not showing

The USB interface sometimes gets confused trying to figure out what controls are available. This is particularly true

when you switch between Apps. Best practice is to make sure you close all Apps that may be running in background.

Once you do that, restart your choice App. The Mic Input should appear correctly. If not, do this:

FIRST: plug the USB Camera Adapter Cable into your iOS device.

SECOND: plug the SP15 into the Camera Adapter Cable.

THIRD: launch your choice App.

Recording has RF interference

FiLMiC Pro iOS

scale green green green green yellow red

generator mV rms 5 10 20 40 80 160

calculated level in dB -30.1 -24.1 -18.1 -12.0 -6.0 0

PB level dB(analog) -31 -25 -19 -13 -7 -1

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