Mariah Carey

Carey's output makes use of electronic instruments such as drum machines, keyboards and synthesizers. Many of her songs contain piano-driven melodies, as she was given piano lessons when she was six years old. Carey said that she cannot read sheet music and prefers to collaborate with a pianist when composing her material, but feels that it is easier to experiment with faster and less conventional melodies and chord progressions using this technique. While Carey learned to play the piano at a young age, and incorporates several ranges of production and instrumentation into her music, she has maintained that her voice has always been her most important asset: "My voice is my instrument; it always has been." Carey began commissioning remixes of her material early in her career and helped to spearhead the practice of recording entirely new vocals for remixes. Disc jockey David Morales has collaborated with Carey on several occasions, starting with "Dreamlover" (1993), which popularized the tradition of remixing R&B songs into house records, and which Slant magazine named one of the greatest dance songs of all time. From "Fantasy" (1995) onward, Carey enlisted both hip-hop and house producers to re-structure her album compositions. Entertainment Weekly included two remixes of "Fantasy" on a list of Carey's greatest recordings compiled in 2005: a National Dance Music Award-winning remix produced by Morales, and a Sean Combs production featuring rapper Ol' Dirty Bastard. The latter has been credited with popularizing the R&B/hip-hop collaboration trend that has continued into the 2000s, through artists such as Ashanti and Beyoncé. Combs said that Carey "knows the importance of mixes, so you feel like you're with an artist who appreciates your work—an artist who wants to come up with something with you".
• Voice and timbre
"I have nodules on my vocal cords. My mother says I've had them since I was a kid. That's why I have the high register and the belting register and I can still be husky. A lot of people couldn't sing through the nodules the way I do; I've learned to sing through my vocal cords. The only thing that really affects my voice is sleep. Sometimes if I'm exhausted, I can't hit the really high notes. My doctors showed me my vocal cords and why I can hit those high notes. It's a certain part of the cord that not many people use—the very top. My natural voice is low. I have a raspy voice. I'm really more of an alto. But my airy voice can be high if I'm rested. ... When I was little, I'd talk in this really high whisper, and my mom would be like, 'You're being ridiculous'. I thought if I can talk like that I can sing like that. So I started just messing around with it. I'd practice and practice, and she'd be like, 'You're gonna hurt yourself'. I'd tell her, it doesn't hurt. If I were to try and belt two octaves lower than that, that would be a strain."