Function

Function

Playing back sound




All functions in the audio module (AUD) (16/105) are controlled by the signals from other nodes in the MOST network.
To initiate audio playback, a control module transmits a request to the infotainment module (ICM) (3/281). The infotainment control module (ICM) allocates the request to the audio module (AUD) then the control module can transmit data via the MOST network to the audio module (AUD).
The infotainment control module (ICM) processes changes to the volume, balance, bass, treble and equalizer settings. The infotainment control module (ICM) transmits the changes via the MOST network to the audio module (AUD) which then carries out the changes.

The control modules on the MOST network which use the audio module (AUD) to play back sound are:
- multimedia module (MMM) (16/108) for voice guiding (navigation)
- integrated audio module (IAM) (16/1)
- Subwoofer module (SUB) (16/79)
- phone module (PHM) (16/60), handsfree speaker sound
- Bluetooth phone module (BPM) (16/147), handsfree speaker sound
The audio module (AUD) can generate simple sound signals which are used for example to warn the driver and passengers if there are problems. These signals are transmitted from the infotainment control module (ICM) via the MOST network to the audio module (AUD).
When the Audio module (AUD) has received optical signals on the MOST network, the signals are transmitted onwards as analog signals to:
- loudspeaker left front (16/4, 16/55)
- loudspeaker right front (16/3, 16/56)
- loudspeaker left rear (16/6, 16/136)
- loudspeaker right rear (16/5, 16/137)
- center loudspeaker (16/26) (option).
The microphone (16/98) is directly connected to the audio module (AUD). The microphone sends analog signals to the audio module (AUD) when telephone calls are made via the handsfree. The signal is then sent via the MOST network to the Bluetooth phone module (BPM) or the Phone module (PHM).
The speaker sound is sent from the Bluetooth phone module (BPM) or the Phone module (PHM) to the Audio module (AUD) via the MOST network.
When sound compensation is required, the infotainment control module (ICM) transmits sound compensation signals via the MOST network to the audio module (AUD).
If the vehicle is equipped with a Parking assistance module (PAM) (4/86) a request is sent to the Audio module (AUD), when audio is to be sent to the speakers when an object is close to the vehicle.
For further information, see Design and Function, Parking assistance module (PAM).