Vaddio EasyUSB PRO MIC I/O - Manual (Page 11)

PRO MIC I/O
Vaddio PRO MIC I/O - Document Number 342-0569 Rev A Page 11 of 16
STEP3 (Alternative):
An alternative method for setting microphone gain can be accomplished with USB audio analyzer software. In
the example below, TrueRTA (
www.trueaudio.com ) is used to set the microphone gain on the PRO MIC I/O.
a) Open TrueRTA software application.
b) Start the audio input (GO). While monitoring the spectrum view, speak into the microphone at typical
distance used in the conference room.
c) Increase or decrease the PRO MIC I/O front panel gain controls. Audio peaks during speech should be
approximately 0dBu.
Image: TrueRTA Levels
 Alternative STEP 4:
Unplug the microphone from the Input Channel 1.
 Alternative STEP 5:
Plug the next microphone being installed into Input Channel 2 and repeat the process described in step 3 to
set the desired gain.
Important Note: It is recommended that only one (1) microphone is plugged (or mute
other channels) into the PRO MIC I/O when setting gain levels. This is desired to
normalize the input level for the automatic microphone mixing function embedded into
the PRO MIC I/O DSP. All mic channels should have similar input levels with speech.
Normalization ensures optimal performance of the automatic mic mixer while preventing
any individual mic input to have precedence in the gating decisions.
 Alternative STEP 7: It is recommended that that the front panel lock function on the rear dip switches be
enabled once the desired gain settings are configured. This will prevent accidental changes or adjustments
by the end users or self-realized audio specialists.