Born in Lawrence, Kansas, Carey's first encounter with the drums began at the age of ten by joining the school band and taking private lessons on the snare drum. Two years later, Carey began to practice on a drum set. In his senior year of high school in Paola, Kansas, Carey joined the high school jazz band. Jazz would later play a huge role in his signature approach to the drum set in a rock setting. As Carey progressed through high school and later college at the University of Missouri–Kansas City, he began expanding his studies in percussion with theory into the principles of geometry, science, and metaphysics as well as delving into the occult. Carey also played jazz while attending college and got to experience the jazz scene in Kansas City. After college, a friend and bandmate convinced Carey to leave Kansas for Portland, Oregon, where he played briefly in various bands before moving to Los Angeles, where he was able to perform as a studio drummer with Carole King and perform live sets with Pigmy Love Circus. He also played in Green Jellö as Danny Longlegs and recorded the album Cereal Killer. He would later find his way to Tool after coming to know singer Maynard James Keenan and guitarist Adam Jones and practicing with them in place of drummers the two had requested but had never shown up. Besides Tool, Carey also finds time for other projects new and old such as Legend of the Seagullmen, Pigmy Love Circus, Volto!, and Zaum.
Geometric designs
Carey has laid claim to various drumming techniques that use sacred geometric figures such as the unicursal hexagram. The final product is very recognizable, fluent drumming, although to him it is much more: the official Tool website claims that Danny uses drumming as a ritual similar to occult rituals, with purposes varying from spiritual exploration to "a gateway summoned a daemon he has contained...that has been delivering short parables similar to passages within The Book of Lies". Another geometric reference from the website was the inclusion of Nothing in This Book Is True, But It's Exactly How Things Are by Bob Frissell on the band's recommended reading list, a book that deals with sacred geometry and the evolution of human consciousness.
Side projects and other musical endeavors
In his time away from Tool, Carey has contributed to a vast number of projects:
Fusion band Volto!, which regularly plays shows in the Los Angeles area, consisting of both covers and original material.
Pigmy Love Circus, which has recorded several albums
Electronica-oriented project Zaum
Green Jellö
Pigface
Drums on the track "Use Less" from the album The Greater Wrong of the Right by Skinny Puppy
Contributed to Adrian Belew's Side One and Side Three projects with bassist Les Claypool
Drums on certain tracks of the Carole King album Colour of Your Dreams with Guns N' Roses guitarist Slash playing on select tracks
Drums on the track "Somewhere" from the Collide album Some Kind of Strange and several tracks from Two Headed Monster
Made an appearance on the 1997 album Free Mars by former Tool bassist Paul D'Amour's band Lusk
Carey uses the wood tip version of his own signature model of drumstick made by Vic Firth. He previously had endorsed a signature model with Trueline Drumsticks At Winter NAMM 2009 Sonor released a Danny Carey signature snare drum, which is a 1 mm thick bronze 14x8" snare with laser etched talisman symbols and his signature engraved around the vent hole. Carey also uses Paiste cymbals, Evans Drumheads, Hammerax Percussion, and Korg and Roland electronics. Danny also uses VK drums handmade in the U.K by Alan Van Kleef. The Monad Aluminium kit and the 7empest, a snare made of bronze weighing almost 20kg.
Drumming techniques
Carey's popularity among drummers and non-drummers alike stems from the diversity of his sound and dynamics through his years of learning jazz music, his technical ability, frequent use of odd time signatures, polyrhythms and polymeters. He has stated in interviews that he effectively treats his feet as he does his hands: he practices rudiments and even snare drum solos with his feet to improve his double bass drumming, hi-hat control and foot independence. In search of new techniques, Carey has studied tabla with Aloke Dutta, who can be heard playing on the live version of the song "Pushit". This is especially apparent on tracks such as "Disposition" or "Right in Two", for which Carey has recorded the tabla parts himself in the studio. The tabla used in Tool's music are replicated live using the Mandala pads. He has also stated that when he is playing to an odd time signature, he tries to drum to the "feel" of the song and establish general "inner pulse" for the given time signature instead of fully counting it out. Carey has been featured in many drum and music magazines.