https://techcrunch.com/2021/05/17/amazon-makes-its-its-lossless-music-streaming-service-a-free-upgrade/

On the heels of this morning’s announcement of Apple’s next-generation music service featuring lossless audio and spatial audio with support for Dolby Atmos, Amazon is making a move likely aimed at retaining its own streaming music subscribers. The company says that going forward, its high-quality streaming tier, Amazon Music HD, will be made available to all eligible Amazon Music Unlimited subscribers at no extra cost.

Amazon first announced Amazon Music HD in fall 2019 with access to over 50 million songs that would stream in what Amazon is calling HD, with a bit depth of 16 bits, and a sample rate of 44.1kHz (around CD-quality). It also promised “millions” more songs that would stream in Ultra HD, or 24-bit, with a sample rate of up to 192kHz (or better than CD quality).