A: Answer Sound quality doesn't have anything to do with the USB stick you use. It is a matter of what quality was the recording made in and what quality of the playback device is. If a song is MP3 and recorded with less than 128K bits per second, it will sound poor but take up less space. 192K is probably optimal as it has very good quality and still, reasonable file size. Again, these figures are for MP3 format, which I would guess that your car radio is looking for.

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