I don't know where to post this so I put it here
I have decided to use my Lenovo window 8.1 tablet in my car instead of using my HU as a player
now windows 8.1 does not have an optical output so I used with it edirol ua 4fx which is connected optically to my alpine pxa 800 car processor.
I like the edirol ua 4fx but its kinda big, the reason why I like it is that I can manipulate the sound by increasing the treble and bass and other things using knobs.
Is there another sound card maybe smaller in size that I can use instead of edirol that allows manipulating sound and has optical line.