I wanted to get a 3.5mm to USB connector/cable to hook my Sensation into my JVC car stereo so I can play music as well as charge my Sensation (as opposed to just using the aux input wich has lower sound quality & does not charge the phone), But I ran across a couple different 3.5mm tips on the cables. One has 3 lines on the male barrel while another has 2 lines on the male barrel. Im just not sure what the lines mean & want to be sure I get the right one. I know the connector I use to connect to my Altec Lansing computer speakers in the bar room only has 2 lines on them but I want to be sure to get the right connector for my car... any input is appreciated!