It replaces the previous "Mastered for iTunes". The new name should make clear that the especially carefully encoded AAC files are not only available for downloads from the iTunes Store, but also for streaming from Apple Music. The source material is always a high-resolution original master with at least 24 bits, which the labels send to Apple. There it passes through the in-house format converter, which downsamples it to 44.1 kHz without aliasing effects and passes it on to the AAC encoder in 32-bit floating point format without dithering. At the end, there is an AAC file with 256 kBit/s, as before. The encoder has now been further improved, Apple emphasizes. The name "Apple Digital Masters" does, however, not only stand for newly encoded songs: all previous "Mastered for iTunes" releases will also run under "Apple Digital Masters".