Hi, I'm looking to get one of these to attach to my older Ipod Nano so that I can stream music to my recently bought Azatom Multiplex D1 radio (fantastic sound). It seems that there are one's that connect to the 32pin plug or some to the aux (or both) Would anyone know if the sound quality would be any different between the two connections? The only other thing I am thinking of is that if it is connected via aux then I could still use the 32 pin socket to keep it charged via the usb connection on the back of the radio? Thanks