System Description

AUDIO SYSTEM


System Description

The audio system is equipped with the following functions. Each function can be operated with the multifunction switch, preset switch or steering switch. It indicates the operation status of AUDIO to the display.






FUNCTION DESCRIPTION

Operating Signal
Operation of the audio system can be performed with the multifunction switch, preset switch or steering switch.
- Operating signal is transmitted to AV control unit with AV communication when it is operated by multifunction switch or preset switch. The CD ejection operating signal is performed by hardwire.
- Operating signal is transmitted to AV control unit with steering switch signal when it is operated by steering switch.

Screen Display
- The display switching of the screen is performed with the communication signal between the display and the
AV control unit.
- The image signal to display operating condition is performed with RGB signal, RGB area signal and RGB image synchronizing signal.

AM/FM Radio Mode
- AM/FM radio tuner is built into AV control unit.
- Audio signal is received by rod antenna, next it is amplified by antenna amp, and finally it is input to AV control unit. Audio signal is input to BOSE amp. and BOSE amp. outputs to each speaker.

CD Mode (6CDs)
- CD changer (up to 6CDs) is built into AV control unit.
- AV control unit outputs audio signal to BOSE amp. and BOSE amp. outputs to each speaker when CD is inserted to AV control unit.

Satellite Radio Mode
- Satellite radio tuner is controlled by communication signal and request signal with AV control unit.
- Sound signal (satellite radio) is received by satellite antenna and transmitted to AV control unit. Sound signal (satellite radio) is transmitted from AV control unit to BOSE amp. and transmitted from BOSE amp. to each speaker.

iPod Connection
- Connect iPod� and iPod adapter with wire harness and iPod adapter input iPod sound signal from iPod�.
When iPod mode is selected, iPod adapter output iPod sound signal to AV control unit. AV control unit output sound signal to BOSE amp., and BOSE amp. output sound signal to each speaker.
- Receiving/transmitting of iPod� operation signals are performed as follows:
- between AV control unit and iPod adapter: AV communication.
- between iPod� and iPod adapter: serial communication.
- The iPod� connection status can be recognized whether iPod adapter receives iPod connection recognition signal.
- The iPod adapter is possible to charge iPod�.
iPod� is a trademark of Apple inc., registered in the U.S. and other countries.

AudioPilot�
AudioPilot� is a sound improving system that picks up by a microphone in a driver headrest any noises or the sound of music coming into the vehicle, and that uses the BOSE amp. to revise the frequency feature of music in real time in response to the frequency feature of the noise while driving and listening to music.
- If the low frequency area noise from the vehicle is loud, it adjusts the low frequency element of music to be larger than the vehicle noise.
- If the high frequency area noise from the vehicle is loud, it adjusts the high frequency element of music to be larger than the vehicle noise.
- If the vehicle noise is smaller than the setting volume, correction is not performed. This eliminates the vehicle noise when listening to music.

Sound Equalizer Automatic Switching Function
Sound quality in a fully-open retractable hard top condition is improved by the correction for bringing the frequency characteristics in a fully-open retractable hard top condition closer to the characteristics in a fully-closed retractable hard top condition. When the retractable hard top is in a fully-open condition, sound pressure is reduced due to the absence of sound echo generated by sound reflection from the retractable hard top.
BOSE amp. detects an open-close condition of the retractable hard top by receiving a roof status signal from the retractable hard top control unit and switches the equalizer to correct the frequency characteristics in a fully-open retractable hard top condition. During the switching of the equalizer, audio stops temporarily due to the temporary mute.