The tech service will support high quality, lossless and spatial audio via Dolby Atmos for its regular subscribers at no extra cost.
Oliver Schusser, Apple’s vice president of Apple Music and Beats, said in a statement: "Apple Music is making its biggest advancement ever in sound quality.
“Listening to a song in Dolby Atmos is like magic. The music comes from all around you and sounds incredible.
"Now we are bringing this truly innovative and immersive experience to our listeners with music from their favourite artists like J Balvin, Gustavo Dudamel, Ariana Grande, Maroon 5, Kacey Musgraves, The Weeknd, and so many more.
"Subscribers will also be able to listen to their music in the highest audio quality with Lossless Audio. Apple Music as we know it is about to change forever.”
Initially, there will be 20 million lossless audio songs, with 75 million available by the end of the year.
Meanwhile, Amazon has made its high quality streaming tier Amazon Music HD part of the standard Amazon Music Unlimited subscription - again at now extra cost.
Steve Boom, VP of Amazon Music, commented: "When we first launched Amazon Music HD, our goal was to lead the industry by enabling music fans around the world to stream the best quality recording, the way artists intended their music to be heard.
“We’re thrilled now to make Amazon Music HD available to everyone at no extra cost. All music fans should have access to this quality of music, and now they do!”
Spotify is set to launch its own HiFi service this year, but there has been no official word on timing or price.