my old bike had a aftermarket shark audio system. my Garmin had an SDcard port. so music would play from the SD card into the amp. when a directional command came up, music would cut off, betty would say turn left and the tunes would come back on. with the on board system on our 6's how can I set this up again? we're running a jump drive from the back for tunes (radio up here sucks all talk no tunes pbbbt). I guess my question is if I can find a GPS that accepts jump drives or SDcards, can it be connected to the on board and get the same result?