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13.4 COMMON PROBLEMS DURING
CALIBRATION
If the calibration tool plays more than 3 MLS bursts for a speaker, it means that it’s finding it difficult to perform a
reliable measurement of that speaker.
The most common warning messages are explained below:
• “Crest factor too low for capsules”:
o Check the Input Meters in the Processor/Meters page.
o If the Input level is null on at least one of the 4 channels, go back to the Optimizer Settings/Calibration
page and stop the calibration.
o Check that the selected analog physical input is selected in the Home/Select page.
o Make sure the microphone routing is correct.
o The microphone battery may be low. The red led at the front of the microphone indicates the battery
level.
o The microphone or cable could be damaged.
• “Unstable position for speaker”:
o Someone may have moved during the calibration.
o Too many strong reflections around the microphone environment could be disturbing the impulse
response measurement.
o An obstacle between the microphone and any of the speakers can disturb the measurement.
o The bandwidth of one of the speakers may be too narrow.
• “Unable to localize speaker” :
o Dipole/bipole speakers provide more than one wave at the same time, which can cause issues.
o Several speakers may be chained, providing more than one wave at the same time.
13.5 CALIBRATION STATUS
The calibration status has 3 possible values:
• Yes : If no problem occurred during the measurement. After calibration, the Top Bar indicates NOT READY,
which means no sound can go through the processor until the optimization filters are computed.
• Partial : If the calibration was stopped in the middle of the measurement process.
• No! : When no measurement has not been performed.
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