Do the cable and the radio have to be on matching FM stations?
No, it is supposed to act like the cd changer.
And i have a FM transmitter but I dislike it because of where I live, Long Island has way to many signals and the reception and sound quality sucks.
I just don't want to have wasted money on this crapy thing.
I may try the thing that Jma20a said that would work and plus looks kinda cool. extra buttons are always fun.