Audio Systems: Range Rover DSP control?, dsp modes, dsp control

Question
Good day,

I am replacing my Alpine (Land Rover unit) with a Car PC. For now I am using the earphone out from the std onboard sound card.

I have found out how the head unit and DSP worked and can get audio correct but now I need to remove the head unit and want to be able to control the DSP settings (vol, bass, tre, bal, fad, sub-vol, DSP modes etc).  Is there a interface I can buy to access these settings?  Or can I build something to do this?
Would be perfect if I can control the DSP from the PC (serial or a protocol unit) using a plug-in on the Centrafuse platform.
I also need to know which of the wires I can remove and which I need to keep and which are the bus coms?

Thank you,
CRV.

Answer
only the radio can control the DSP settings they are data to the factry amplifier, i am sure it is posible but i have no idea how
there are no modules or interface for this because the radio digital signal controls the factory amplifier
good luck