System Description

AUDIO SYSTEM


System Description

The audio system is equipped with the following functions. Each function is operated with multifunction switch, preset switch, touch panel, steering switch or audio recognition. Operation status of AUDIO is indicated at display.





FUNCTION DESCRIPTION

Operating Signal
Audio system operation can be performed with multifunction switch, preset switch, steering switch, touch panel function or voice recognition function.
- 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.
- Refer to BOSE Audio With Navigation for explanation of voice recognition function and touch panel function.

Screen Display
- Switching of display is performed with serial communication between display unit and 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.

Satellite Radio Mode
- Satellite radio tuner is built into AV control unit.
- Audio signal (satellite radio) is received by satellite antenna, and it is input to AV control unit. AV control unit outputs audio signal to BOSE amp. The signal is also outputted from BOSE amp. to each speaker.

CD Mode
- CD function 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.

Music Box Mode
- Music CD data is stored on HDD that is built into AV control unit, and it can be played.
- AV control unit outputs music (audio signal) that is stored on HDD to BOSE amp., and BOSE amp. outputs to each speaker.

CF Mode
- AV control unit has built in CF replay function.
- Music (audio signal) that is stored in CF outputs to BOSE amp., and BOSE amp. outputs to each speaker when CF is inserted into AV control unit.

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.