43If a new version of the navigation soft-ware is found, pressing the YES icon willcause the unit to extract the softwarefrom the USB device and update thenavigation software. Press the NO iconand the unit will return to previousmode prior to the upgrade.If a new version of the navigation soft-ware is not found, pressing the NO orYES icon will cause the unit to return toprevious mode prior to the upgrade.ASP:Press the ASP icon and the followingscreen will appear:The ASP (Audio Sound Parameters)submenu provides for the adjustmentof various audio signals. Press the BASSFREQ icon and the following screen willappear:The screen allows the Bass CenterFrequency to be set to the abovefrequencies to optimize the audiooutput for your vehicle.Press the TREBLE FREQ icon and the fol-lowing screen will appear:The screen allows the Treble Center Fre-quency to be set to the above frequen-cies to optimize the audio output foryour vehicle.Press the SUB FILTER icon and thefollowing screen will appear:The screen allows the Sub Filter Fre-quency to be set to the above frequen-cies to optimize the audio output foryour vehicle.Press the BASS Q-FACTOR icon and thefollowing screen will appear:The screen allows the Bass Q-Factor tobe set to the above frequencies to opti-mize the audio output for your vehicle.