Dr. Know is the stage name

Stage name

A stage name, also called a showbiz name or screen name, is a pseudonym used by performers and entertainers such as actors, wrestlers, comedians, and musicians.-Motivation to use a stage name:...

 of Gary Miller, guitarist

Guitarist

A guitarist is a musician who plays the guitar. Guitarists may play a variety of instruments such as classical guitars, acoustic guitars, electric guitars, and bass guitars. Some guitarists accompany themselves on the guitar while singing.- Versatility :The guitarist controls an extremely...

 for Bad Brains

Bad Brains

Bad Brains is an American hardcore punk band formed in Washington, D.C., in 1977. They are widely regarded as among the pioneers of hardcore punk, though the band's members objected to this term to describe their music. They are also an adept reggae band, while later recordings featured elements of...

, regarded as one of punk rock

Punk rock

Punk rock is a rock music genre that developed between 1974 and 1976 in the United States, the United Kingdom, and Australia. Rooted in garage rock and other forms of what is now known as protopunk music, punk rock bands eschewed perceived excesses of mainstream 1970s rock...

's most innovative and important bands. Critic Rick Anderson praises Miller's "ability to meld the raw directness of hardcore punk with an almost supernatural virtuosity without sacrificing the power of either approach".

Miller has recorded or performed very little outside the group, though he has performed with Mos Def

Mos Def

Dante Terrell Smith is an American actor and Emcee known by the stage names Mos Def and Yasiin Bey. He started his hip hop career in a group called Urban Thermo Dynamics, after which he appeared on albums by Da Bush Babees and De La Soul. With Talib Kweli, he formed the duo Black Star, which...

's group Black Jack Johnson. He also performed a solo on the Coheed and Cambria

Coheed and Cambria

Coheed and Cambria is an American progressive rock band from Nyack, New York. Formed in 1995, the group incorporates aspects of progressive rock, punk rock, metal and post-hardcore....

 song "Time Consumer" for their first album The Second Stage Turbine Blade

The Second Stage Turbine Blade

The Second Stage Turbine Blade is the first studio album released by rock band Coheed and Cambria. It was originally released on February 5, 2002 through Equal Vision Records. It is the second part of a five-part pentalogy, telling the story of The Amory Wars...

and collaborated with the Deftones

Deftones

Deftones are an American alternative metal band from Sacramento, California, founded in 1988. The band consists of Chino Moreno , Stephen Carpenter , Chi Cheng , Frank Delgado , and Abe Cunningham . Currently Sergio Vega is standing in on bass while Cheng recovers from a car accident...

 on Saturday Night Wrist

Saturday Night Wrist

Saturday Night Wrist is the fifth studio album by American metal band Deftones. It was released on Maverick Records on October 31, 2006. Despite early contributions that were later scrapped, Saturday Night Wrist marks the departure of mainstay Deftones producer Terry Date.The band's fifth album...

, although his contributions do not appear on the album. He recently made an appearance at the Trocadero in Philadelphia, PA, playing two songs with students from Paul Green's School of Rock Music at the Best of Season show.