After opening the CapteurZ software, select “Paramétrage→Définition des voies.”
Click on “Browse,” then use the CTRL key to select individual channels in numerical order.
If this is the first time using the system, it may be necessary to create a project directory first, before calibration (under “Projet→Nouveau”, especially need to specify a directory under “Répertoire de sauvegarde des projets”, otherwise you get error messages).
Then select “Paramétrage→Nouvelle calibration du capteur.”
Select “enregistrement automatique” checkbox at bottom to avoid having to save after each of the 4 frequency band calibrations (unless not sure about audio levels).
If using the MOTU M4, the 1/4” adaptor on the cable going to the CapteurZ head should be connected to the Line Out #3 port on the back of the MOTU M4. Then make sure that the selected output audio device on the computer is set to “Out 3-4 (MOTU M Series)” and set the output gain on the computer to 50%. The CapteurZ amp level knob should be set to 5.5 (anything higher will produce undesirable results).
If you see a strong peak in the frequency response of any of the sub-calibrations or in the final calibration, it is necessary to reduce the volume levels.
After successful calibration, go to “Mesure” menu to start an actual measurement.
The 60 cm aluminum pipe pictured below is a convenient object to test the measurement system with, since theoretical models of its impedance are readily available and fairly accurate.