Sony MAS-A100 Integration Manual page 38

Microphone array system
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Tips on calibration
Remain quiet during calibration, since random noises may affect the optimization.
Set the audio system not to use any non-linear processing upon calibration.
Non-linear processing, such as automatic gain control or input noise reductions
prevents the calibration using the noise signal.
During the calibration of an MAS-A100, other MAS-A100 units for speech
reinforcement in the same audio system should be muted. MASM-1 automatically
switches calibration and muting of MAS-A100 units one at a time when calibrating
a selection of multiple MAS-A100 units. All microphones other than the MAS-A100
units should be muted (low volume or switched off) during calibration.
7.
Check the calibration results.
When calibration is completed, the results are displayed in the [Status] field.
A 5-level rating ([Excellent (5)], [Good (4)], [Average (3)], [Fair (2)], [Poor (1)])
is displayed. The higher the rating value, the higher the limit for speech
reinforcement of the audio.
If the rating is [Fair (2)] or [Poor (1)], review the installation environment of the
MAS-A100 (see "4.1 Initial setup") and the audio system settings ("Preparation"
in this section), and then perform calibration again.
Note
After checking the calibration results, do not change the input gain, master
volume, and audio quality settings of the audio system. If these settings are
changed, calibrate all the MAS-A100 units again.
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