Just a heads up for any Play-Fi Streaming device owners. The announcement was on October 31, 2019.
From the press release:
Amazon Music HD is a new tier of premium quality music with more than 50 million songs in High Definition (HD) and millions of songs in Ultra High Definition (Ultra HD), the highest quality streaming audio available. At just $12.99/month for Prime members or $14.99/month for Amazon customers, Amazon Music HD makes high quality, lossless audio accessible to all music fans. Existing Amazon Music Unlimited subscribers (Individual or Family Plan) can upgrade to Amazon Music HD for an additional $5/month.
Amazon Music HD offers lossless audio in two quality ranges: HD and Ultra HD.
HD tracks are 16-bit audio, with a minimum sample rate of 44.1 kHz (16/44.1 is also referred to as CD-quality), and an average bitrate of 850 kbps. Ultra HD tracks have a bit depth of 24 bits, with sample rates ranging from 44.1 kHz up to 192 kHz, and an average bitrate of 3730 kbps.
In comparison, most standard streaming services currently offer Standard Definition (SD) with a bitrate up to 320 kbps. These audio files use lossy compression, where details of the original audio are removed in order to reduce the file size. By contrast, Amazon Music HD preserves the original recording information to deliver the highest quality sound available, more than 2x the bitrate in HD and more than 10x the bitrate at the highest Ultra HD bitrate. Amazon Music HD will always play the highest quality content available, based on network, device capability and your selected settings.
With DTS Play-Fi, you can stream Ultra HD content up to 24 bit / 192 kHz on all your favorite DTS Play-Fi audio products that support Critical Listening mode. Even without Critical Listening mode, you can enjoy multiroom audio in HD (lossless) quality on every DTS Play-Fi product across all brands. Save Playlists and Stations to Presets for quick and easy playback and management using DTS Play-Fi. Getting the best in audio quality has never been so easy.