However, the data these technologies discard consists of sounds that humans rarely, if ever, notice-such as an acoustic guitar string being lightly plucked at the same instant as a loud cymbal crash. A “lossy” service, on the other hand, reduces sound quality by using a compression technology such as MP3, AAC, or Ogg Vorbis to discard most of the original digital data. Lossless music streaming uses compression technologies (FLAC and ALAC) that do not discard any of the music file’s data, so listeners can access a perfect, bit-for-bit reproduction of the original audio. In the world of music-streaming services, “lossless” means that the streaming process does not affect the quality of the sound. But considering how Apple downplayed the announcement, preferring to focus on its introduction of Dolby Atmos immersive music (which we’ll discuss in a separate article), we have to wonder how many listeners will share audiophiles’ excitement. And so, in the course of a single morning, affordable, no-compromise music streaming had become widely available. Within hours, Amazon Music announced that it would eliminate its $5-per-month charge for lossless streaming.

Audiophiles recently got what they’d long demanded: Apple Music announced on May 17 that it was adding a lossless streaming service that delivers uncompromised sound quality at no extra charge.

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