Does anyone know why when i attach a genuine VW/Seat 6 cd changer to my AURA headunit it doesnt sound right. Sounds as though the spekers are under water. The radio and single slot cd work perfectly but cant get this changer to work. Ive got the genuine cable from seat to fit into the back and the changer appears to be working fine as other units ive tried make exactly the same noise. Could it be my Headunit?? Any answers would be much appreciated.