Audiophilepure

https://www.whathifi.com/amazon/music-unlimited/review

Amazon refers to HD tracks as having a ”bit depth of 16-bits, a minimum sample rate of 44.1 kHz (also referred to as CD-quality), and an average bitrate of 850 kbps.” UHD tracks, on the other hand, “have a bit depth of 24-bits, sample rates ranging from 44.1 kHz up to 192 kHz, and an average bitrate of 3730 kbps.”

To Amazon’s credit, it pushes Ultra HD content extremely hard on the service with dedicated playlists and clear labelling, eg Best of Ultra HD, Ultra HD: New Arrivals, Ultra HD Hip-Hop and Ultra HD Jazz. It doesn’t take long to find a steady stream of UHD music to listen to.

Click on the bright yellow HD or Ultra HD logos that accompany each track (on either desktop or mobile) and you are shown the sample rate of what you are playing together with the playback capabilities of your machine. The desktop app will even prompt you to change the audio settings on your computer to take advantage of the improved audio quality. It’s a clever and thoughtful touch, especially if you want to connect an external DAC that can handle all the available sample rates natively and make the most of Amazon’s hi-res library.

https://www.soundandvision.com/content/format-changes-coming-soon-tidal

The move to drop Sony’s 360 Reality Audio format comes in the wake of the decision to embrace Dolby Atmos as its go-to format for immersive surround sound. Tidal said it chose Atmos as “the format we will support going forward due to the number of compatible devices, catalog availability, and artist adoption of the format.”

Starting July 24, 360 Reality Audio tracks and albums in subscriber collections, including those in playlists and downloaded for offline access, will be grayed out and unavailable for streaming.A decided blow to Sony and owners of Sony headphones who enjoy listening to music in the format, which was introduced five years ago.

https://www.soundandvision.com/content/format-changes-coming-soon-tidal

MQA tracks in personal collections and playlists will be automatically replaced by the highest quality FLAC version available to the service, though the company admits that there “may not be a replacement for every single one.” For MQA tracks or albums that have been downloaded for offline access, subscribers will need to update to the latest version of the app on July 24 and re-download those tracks.

“We are working hard to ensure all existing MQA tracks will be replaced with a FLAC version in a timely manner,” Tidal says.

The move to drop Sony’s 360 Reality Audio format comes in the wake of the decision to embrace Dolby Atmos as its go-to format for immersive surround sound. Tidal said it chose Atmos as “the format we will support going forward due to the number of compatible 

HDtracks was founded in 2008 by Norman and David Chesky – the GRAMMY Award-winning pioneers of revolutionary audiophile recording techniques and the founders of the groundbreaking audiophile label, Chesky Records. HDtracks has taken their obsession with audio quality seriously. Industry-leading audio technology, painstaking quality controls, a vast library, and user-friendly interface have helped mold HDtracks into one of the world’s leading audiophile music discovery platforms.