What is the best format to upload music to itunes for optimum sound quality? Igor Alpatov May 19, 2016 14:40 Follow WAV Format Provides The Best Quality. We Recommend You convert your Files to .Wav Or .Aif Format, 44.1 KHz, 16-Bit, Stereo. Have more questions? Submit a request 0 Comments Please sign in to leave a comment.