Apple has developed its own lossless audio compression technology called the Apple Lossless Audio Codec (ALAC).
In a new support document, the tech giant also revealed that Apple TV 4K will only support standard lossless audio when it launches.
Apple Music will offer more than 20 million songs in lossless quality for free when the ALAC technology launches in June which will reach over 75 million by the end of this year.
Most audio compression techniques lose some amount of data contained in the original source file.
Lossless compression is a form of compression that preserves all of the original data.
In addition to Lossless Audio Codec (ALAC), the entire Apple Music catalog is now also encoded using ALAC in resolutions ranging from “16 bit / 44.1 kHz (CD quality) to 24 bit / 192 kHz”, a indicated the company.
Apple will stream music using lossless audio compression to iPhone, iPad, Mac, and Apple TV.
“Lossless will play normally over Bluetooth speakers and headphones. However, Bluetooth connections do not support lossless audio,” the company said.
Radio streaming, live radio, and on-demand content from Apple Music 1, Apple Music Hits, Apple Music Country, and music videos will not be available in lossless audio.
“We are providing Apple Music subscribers with the additional option of accessing our entire encoded catalog using lossless audio compression at no additional cost,” the company said.