Quote: Originally Posted by Putput
I've found this page
here where they sell CDC units, according to this info all HU Tuner List and Update List from 2000 on are compatible.
The "from 2000 on" means "digital sound link".
Quote: Originally Posted by CristianC
Is possible that some models to use analog input (not SP/DIF) for CDC audio line? (

I hope)
As far as I know, models before 2000 had analog sound between CDC and HU.
Which car model and year do you own ?