Design

Design

Control module




The Audio module (AUD) is an amplifier that transports the audible signal, transmitted on the MOST network, out to the directly connected loudspeakers.

The following versions of Audio module (AUD) are available:
- High Performance
- High Performance HP, headset panel
- Premium Sound HP, headset panel
Audio module (AUD) High Performance and High Performance HP have an output of 4x40 W and Premium Sound 5x130 W.
Each version of the audio module (AUD) has a different number of loudspeakers and different loudspeaker models.

Functions in the audio module (AUD)
The audio module (AUD) can run a number of different functions, but these functions can also be activated by other nodes. An example of these functions is lowering and increasing the volume. The signal comes from the infotainment control module (ICM), but it is the audio module (AUD) that actually changes the volume. The functions are described below.
1. Adjustable volume, raises and lowers the volume
2. Adjustable bass, raises and lowers the bass level
3. Adjustable treble, raises and lowers the treble level
4. System generated sound signals, assist other nodes in the system with single sound signals generated in the control module, for example alarm signals for the park assistance function.
5. Limiter, the limiter function in the control module does not permit an increase in the power output level if this leads to a fall in sound quality
6. Mixing, mixing allows numerous different sound types to be mixed. In this case, the different sound types are foreground noise, background noise and system generated sound signals. An example of this is where a CD is playing (background noise) and the carphone rings (foreground noise). The ringing signal will be heard through the loudspeakers while the volume of the music drops at the same time
7. Bass compensation, the bass from the control module is compensated or modified depending on the volume level and the speed of the car. If the vehicle speed and volume level changes, the bass compensation is also changed
8. Treble compensation, the treble in the control module is compensated or modified depending on how the volume is changed. If the volume changes, the treble compensation also changes
9. Equalizer setting, sound compensation, there are different settings for the sound from the audio module (AUD). This compensates for factors such as the location of the loudspeakers and the layout of the car interior.
10. Dolby ProLogic II, a surround decoder for sound reproduction.
There are two types of sound, foreground sound and background sound. The sounds which are foreground and background are listed below.

Foreground sound:
- navigation
- system generated sound from the audio module (AUD) (different types of alarm sound)
- traffic messages.

Background sound:
- analog radio, AM/FM
- CD player.
The functions in the different versions of the audio module (AUD) are:

High Performance
1. adjustable volume
2. adjustable bass level
3. adjustable treble level
4. system generated sound signals
5. limiter.
6. mixing
7. bass compensation
8. treble compensation
9. equalizer.

Premium Sound
1. adjustable volume
2. adjustable bass level
3. adjustable treble level
4. system generated sound signals
5. limiter.
6. mixing
7. bass compensation
8. treble compensation
9. equalizer.
10. DPL2 - Dolby ProLogic II.

Loudspeakers




High Performance and High Performance HP
8 loudspeakers are used for High Performance and High Performance HP. A 2-way loudspeaker system with bass and mid range with separate treble loudspeakers. The speakers are installed in the front/rear doors.
The impedance is 2 ohms for the base/mid range loudspeakers and 5 ohms for the treble speakers.
Premium Sound
12 loudspeakers are used for Premium Sound. The loudspeaker system consists of separate base, mid range and treble loudspeakers. The rear speakers are a 2-way system with base and mid range speakers and separate treble loudspeakers. To increase the sound there is a 2-way central loudspeaker in the dashboard.
The impedance is 4 ohms for the base loudspeakers, 8 ohms for the mid range and 6 ohms for the trebles. The central loudspeaker impedance is 4 ohms.

Headset panel




The Audio module (AUD) has outputs for connections to the left and right headset panel. The headset panels are located by the rear section of the center console. Each headset panel has a control for volume, next track, previous track and source.