Hello I was wondering if someone could please help as I know nothing about this! I was brought a sony hi fi (just a cheap one) and a sony mp3 player and it says on the stereo you can play mp3's with it and I was just wondering what attachment I would need! My sony mp3 is a usb and the sony hi fi mp3 port looks the same as you would insert standard earphones. I did buy a wire which claimed to work with sonys and just didn't so for the past year my music has been trapped! Much appreciated thank you =)