I hope Apple are using an audiophile-optimised memcpy() function: https://www.audioasylum.com/forums/pcaudio/messages/11/11997...

> found that a function called memcpy was the culprit, most memory players use memcpy and this is one of the reasons why memory play sounds worse ie digital sounding. Fortunately there is an optimised version of memcpy from http://www.agner.org/optimize/, using this version removes the hard edge produced by memcpy.