The Ultra HD content also takes this a step further, with up to 24-bit and 192kHz on offer. HD and Ultra HD music compared to SD streaming tracks AmazonĪmazon's Ultra HD tracks take this much further, cranking the bitrate up to 3,730kbps, which is more than 10 times the bitrate of streaming services like Apple Music.Īll of Amazon's HD tracks are 16-bit, and with a sample rate of 44.1kHz - the same as a CD. Most streaming services tend to offer music at 126bps, while on the desktop Spotify gets closer to the 320kbps maximum. Often referred to as 'CD quality' or 'lossless audio,' HD music tracks stream at a bitrate of up to 850kbps (kilobits per second), which is far higher than the up-to 320kbps rate of standard definition music streams. Where those services play music which is compressed to take up less space and be easy to stream over a slow internet connection, Amazon Music HD delivers uncompressed music - like watching a movie in 4K Ultra HD instead of compressed down to HD or worse. Similar to TV shows and movies with the same branding, HD and Ultra HD tracks contain more data than the standard definition (SD) songs offered by Apple, Google and Spotify.
So let's start with the former - what does HD and Ultra HD music actually mean? There is no hard and fast answer to the latter, because it depends entirely on what device you are using to stream the music, and how you are listening to it. But what does this actually mean, and can you tell the difference?
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