Folks were pretty quick to pick up on (and berate Apple for) their choice to stream at 256kbps, as opposed to oufits like Spotify, Rdio, and Google Play Music (all of which stream at a higher 320kbps). But there's more to it than the numbers (kind of like a 2.4ghz Pentium 4 would get roasted by a modern i5 with a lower clock). Mashable explains:
AAC is a codec — a standardized format for digitally encoding and decoding music in a compressed format, similar to MP3. However, AAC was created specifically to retain better audio quality than MP3 at the same bit rates (i.e. to do more with less), and almost all listening tests confirm that it does so. So format matters just as much as bit rate.
Audiophiles will smirk at 256kbps and Spotify and other competitors will no doubt advertise their higher bit rates as reasons why their services are better than Apple Music, but most people simply can't hear the difference between 256kbps and 320kbps, even with the same format.
As I wrote in my review for Neil Young's PonoPlayer, most regular music listeners either don't know what to listen for when comparing high-quality audio with low-quality audio, or use headphones that simply aren't good enough to render the subtle differences accurately.
So if you're really a true audiophile, the only service good enough to push sound through your golden cochleas is Tidal's extra expensive service. Meanwhile, the 99% will enjoy Apple's choice to balance sound quality with streaming bit rate.
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