Hello, I've had my 2013 DS4 for well over 6 months now and my speakers sound as if they were playing very low bit-rate music. It's listenable but not really that much enjoyable. I've tried bluetooth, aux, radio, different devices. All sound the same. My car doesn't have the touchscreen version so I was guessing that is the reason why but I don't really want to buy a new infotainment system. Is there a way I can fix this?