So I have a modified Sony D-2 discman. (I modified it so that when you pause the CD player, you still hear audio (like a stuck/skipping CD)). http://www.nicolascollins.com/texts/cdhacking.pdf
There is a remote port on the CD player that appears to be a regular 1/8" stereo jack.
In that PDF linked above, on page 3 you see a 'remote' setup, that breaks out 5 switches from the remote port.
I want to be able to skip to next/previous track, forward/rewind, and pause/play from arduino control.
I've tried googling the D-2 remote to no avail. That would make it really easy to control as I can just use the buttons on the remote itself.
I've also tried googling the manual and/or service manual for the D-2 and the most that got me was a page where you have to pay a bunch of money to access the file for 24 hours.....
Is there some other way to figure out what kind of protocol the remote port is using?
I also thought about controlling the onboard Discman buttons, but that only gives me control over previous/next/pause/play, not forward/rewind (which are very useful while glitching/stuck/paused).
You can control that with onboard buttons, but have to go into a menu option, which is harder to manage.