Illusonic
IAP
Chapter 5
IAP Calibration Software
29
5.2
Measuring
IAP will automatically disable all signal processing
during measurement. There is no need to “reset”
equalizers, etc.
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The figure above shows IAP Calibration’s Measurement panel:
1. Determine the microphone measurement positions. Either choose one of
the microphone positions templates or determine your own measurement
positions (choose Custom with up to 64 microphone positions).
2. Select the soundcard connected to IAP and microphone as
IAP Calibration input and output. Select IAP input to Analog,
to receive the measurement signals from the soundcard.
3. Set the microphone to sweet spot position and do a test sweep on each
loudspeaker to check the system. Modify soundcard output level and IAP
volume until the sweep is loud, but does not hurt your ears. Now modify
soundcard microphone input gain until the peak level, shown after each
test sweep, is in the range of -18 and -10 dB for each loudspeaker.
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1 If gains between loudspeakers deviate significantly,
modify their amplifiers’ such that microphone peak
level for all loudspeakers is within the recommended
range. If not possible, modify loudspeaker gains in IAP
Calibration (gain slider above Test Sweep Start
button).
4. Start measurement and move the microphones to the different
positions as instructed by the software. Once you are done, save
the measurement. A measurement is saved as three files (.iapc,
.wav sweep, .wav measurement).
