Ok if the issue is Impedance being too low then you can try one of a couple things to bump the impedance up. They do make impedance adapters which basically add a resistor to each side of the wire. Most likely something small like a 2 Ohm 10 W resistor would do for each side. Since most of you all won't really want to go out and solder up a pair you can try a few tricks to see if this will work. One would be to use a smaller wire (Skinnier wire. Not talking about the shielding around the wire but the actual thickness of the wire itself. The skinnier the better). Normally you want a thick wire (Lowers resistance). Try finding a cheap 3.5 wire somewhere. Monster cables and such would do the opposite (They would lower the impedance). Just remember skinnier wire = higher resistance. longer wire also = higher resistance. Another thing you could try is to get an adapter to convert one side of your 3.5mm cable to a 3mm then plug that into a second adapter to convert it back to 3.5mm. The converting it twice might add enough impedance to it to bump it up into a higher range so it is detected. This is all based on the impedance being too low. If that's not the issue then none of this will help.