Quote:
Originally Posted by mrcheezle19
How big of a difference can you hear from this VS bluetooth or usb connected?
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For USB, the car should be able to read the audio file directly from the device (flash/HD) so quality will be as good as the encoding provides.
A2DP apparently requires your bluetooth device (a phone) first decode then re-encode the audio using another codec (transcode) while streaming. But, if the iDrive supports MP3 playback, I don't understand why they don't simply packetize the MP3 data.
Won't be a big perceived difference between iDrive USB and A2DP, but USB should always sound better.
However, the analog jack may provide the best possible quality if you have a good D/A on your source.