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996 C4 coupe 1999 Audio enhancement

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Hi have just bought the above that has a CD 210 radio with boot mounted CD changer. Underneath the radio is a unit with various equaliser settings, like Hifi and Room.

I haven't got an audio manual to work out how to use it.

Can anyone either suggest what it is and or where to get a manual or part number so I can research it.

Many thanks.

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Digital Sound Processing (DSP)
lDigital sound processingl (DSP) enabling the digital processing of speech and music in the amplifier is another optional extra. The sound package forms the basis. Apart from further acoustic adaptation to the vehicle, this function also allows spatial acoustic simulation. As a result, pre- and  postreflection can be mixed artificially to give, for example, a concert hall effect. Different acoustic spatial effects can be simulated with DSP. On request, acoustic adjustment can be selected to optimize this spatial impression for the driver's seat or passenger's seat.
Furthermore, programmed acoustic patterns can be stored and called up again. The separate operator unit is housed in the center console at the front of the passenger compartment. Different acoustic adjustments can be selected using the various buttons provided.
Other equalizer functions (selectable frequency band) with several amplification levels can be called up using the optional extra information and navigation system (PCM). The DSP facility is operated entirely from the screen controls. The CD player (CD radio or CD changer) is recommended for
optimum DSP sound quality).
DSP button
When the OSP facility is switched on, the functions last activated are switched on again.
DYN button
Speed-dependent volume and acoustic control is switched on/off using this button.
POS button
The row of LEOs briefly light up when the POS button is pressed. The listener's position can be spatially adjusted to the driver, passenger, or the middle of the vehicle using the arrow buttons. The LEOs are lit according to the setting.
HiFi-classic-pop buttons
A permanently defined acoustic pattern is produced when these buttons are actuated. The function can be deactivated by selecting a different acoustic pattern.
User button
The user function is used to create individual acoustic patterns using the room and echo buttons. Spatial impression and echo effect can be changed from low (lefthand LEO) to high (all LEOs) using the arrow buttons.
MI, M2, M3 memory buttons
Permanently defined or individually created acoustic patterns can be stored and called using these buttons. The listener's position (POS button) and speed-dependent volume control (OYN button) functions can be stored in the memory together with the acoustic patterns.
Storing: Press the desired memory button for approx. 2 seconds.
Selecting: Press the desired memory button.


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