Quick question: Is it feasible to modify a factory CD head unit to bypass the D/A converter to an added digital output?
Explanation: I want to use a modded DCX2496 with the volume controls from mbcouple. The reasoning is that the result would be better than a aftermarket headunit in processing and let me keep the factory steering controls--not to mention keep a stealth look.
I could give a whack at adding one after the dcx start shipping. What factory unit. If i can pick one up here at a yard cheap, i will take a look.
Thanks
Hans
Any progress on that issue??? I just read the thread as I have messed around with this issue on several factory HU's a few years ago and could never get what I wanted for an output, then again I was justy a lowly tech, not an engineer. I will have to see if I still have the repair manuals for the units around here. Hmm, no luck yet, cannot even remember where I got them from.
The all in one DAC/volume control, etc, chips were interesting to try to decipher with just the repair manuals, I did however test all suspect pins for a bit stream but could not find an active one.
Sure would be great to have that option for all these new cars with such integrated factory units, a good digital output to feed what ever fancies our taste and budget
Sure would be great to have that option for all these new cars with such integrated factory units, a good digital output to feed what ever fancies our taste and budget
Werewolf might be able to tell you with a service manual... Just ask him if he would be willing to look it over if you send him one... He has done great write-ups over @ ECA of several HU's & Proc's
Thanks for the link to the eca site. I knew you guys would have that base covered.
I second the desire for digital outs on factory stuff.
What part does the transport play in the output of the digital signal? I assume that, other than the d/a converter, that is why the home hifi cd players cost so much.
Now, I know this is an old post, but figured I would respond to it instead of starting a new post.
I have a 2011 GTI that I installed a VW RNS-510 nav in that I want to keep. It is built by Continental and I have no clue what chip is inside, too afraid to open just to see, but if I can add a toslink out I will.
Just wondering if the Headunit that werewolf/lycan was referring to in the other post on Hybrid Audio was the same unit.
I plan to do this to use a bit one digitally. What sources are output digitally? I assume just CD/DVD?
take it apart, write down chip markings, google them up. If you are lucky, you'll find a dac chip. Dacs usually eat i2s format bus which consist of 3-4 wires - masterclock, bitclock, left/right clock, and data. You'll need the last 3 - then you connect them to spdif transmitter (wm8804/5, dit, cs chips) and thats all. Maybe you can get finished kit from twisted pear of such transmitter.
I would look into what can be done to the 315 with VAG COM I know you can do some things but that company doesn't do a SP-DIF conversion.
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