We provide you with the best possible master version in the highest audio quality especially for Apple Music and iTunes customers.  For the latest encoders, Apple uses every bit of the high-resolution master versions, which are created to strict specifications for the mastering engineers and studios. The result is virtually indistinguishable from the original 24 bit studio master version, both stream and download. Also, Apple Music now has Lossless versions of these masters that use the Apple Lossless Audio Codec (ALAC).