Carmen grew up in Harlem and came up in the bebop era, which shaped everything about how she approached a song. She wasn't just a singer who happened to like bebop — she understood the music harmonically in a way most vocalists didn't, because she could play piano. That's not a throwaway detail. It meant she heard chord changes the way an instrumentalist does, and it showed. When she sang a melody, she knew exactly what was happening underneath it, and she'd push against it or lean into it accordingly.

Her style is sometimes described as cool or detached, but that's not quite right. She was controlled, sure, but there's a difference between cool and precise. McRae was precise. She could cut straight to the emotional center of a lyric without any of the theatrical embellishment that some of her contemporaries leaned on. She wasn't going to oversell you anything. If a song was sad, she'd let it be sad without telegraphing it from a mile away.

She worked with Denzil Best early on and was briefly married to him, which put her in the middle of the New York bebop scene at exactly the right moment. Thelonious Monk was a major influence — she recorded an entire album devoted to his compositions, Carmen Sings Monk (1990), which is one of the best things she ever did. Monk's tunes are notoriously difficult to sing because the melodies are so angular and the harmony so specific, but McRae handled them like she'd been waiting her whole life for the assignment.

Her recordings from the 1950s through the 1970s are remarkably consistent, which sounds like faint praise but isn't — a lot of singers from that era made records that haven't aged well, full of dated arrangements and glossy production. McRae's work holds up because her instrument was her intelligence as much as her voice. Albums like After Glow (1957) and The Great American Songbook (1972) show a singer who knew exactly what she was doing and had no interest in fads.

She never quite broke through to the mainstream celebrity level of Ella Fitzgerald or Sarah Vaughan, which is probably why she remains something of a singer's singer — the kind of artist that other vocalists reference constantly even if casual listeners don't always know her name. But spend a few hours with her records and you'll understand the devotion. She was serious about the music in a way that rewards serious listening.