Improvisation is the practice of acting, singing, talking and reacting, of making and creating, in the moment and in response to the stimulus of one's immediate environment and inner feelings. This can result in the invention of new thought patterns, new practices, new structures or symbols, and/or new ways to act. This invention cycle occurs most effectively when the practitioner has a thorough intuitive and technical understanding of the necessary skills and concerns within the improvised domain. Improvisation can be thought of as an "on the spot" or "off the cuff" spontaneous activity.

The skills of improvisation can apply to many different abilities or forms of communication and expression across all artistic, scientific, physical, cognitive, academic, and non-academic disciplines. For example, improvisation can make a significant contribution in music, dance, cooking, presenting a speech, sales, personal or romantic relationships, sports, flower arranging, martial arts, psychotherapy, and much more. Techniques of improvisation are widely trained in the entertainment arts; for example, music, theatre and dance. To "extemporize" or "ad lib" is basically the same as improvising. Colloquial terms such as "let's play it by the ear", "take it as it comes", and "make it up as we go along" are all used to describe "improvisation".

Keith Jarrett (born May 8, 1945, in Allentown, Pennsylvania) is an American pianist and composer who performs both jazz and classical music.

Jarrett started his career with Art Blakey, moving on to play with Charles Lloyd and Miles Davis. Since the early 1970s he has enjoyed a great deal of success in jazz, jazz fusion, and classical music; as a group leader and a solo performer. His improvisations draw not only from the traditions of jazz, but from other genres as well, especially Western classical music, gospel, blues, and ethnic folk music.

In 2003, Jarrett received the Polar Music Prize, the first (and to this day only) recipient not to share the prize with a co-recipient, and in 2004 he received the Léonie Sonning Music Prize.

In 2008, he was inducted into the Down Beat Hall of Fame in the magazine's 73rd Annual Readers' Poll.

Jarrett grew up in suburban Allentown, Pennsylvania, with significant early exposure to music. He possessed absolute pitch, and he displayed prodigious musical talents as a young child. He began piano lessons just before his third birthday, and at age five he appeared on a TV talent program hosted by the swing bandleader Paul Whiteman. The young Jarrett gave his first formal piano recital at the age of seven, playing works by composers including Mozart, Bach, Beethoven, and Saint-Saëns, and ending with two of his own compositions. Encouraged especially by his mother, Jarrett took intensive classical piano lessons with a series of teachers, including Eleanor Sokoloff of the Curtis Institute.

Billy Taylor (July 24, 1921 – December 28, 2010) was an American jazz pianist, composer, broadcaster and educator. He was the Robert L. Jones Distinguished Professor of Music at East Carolina University in Greenville, and since 1994, he was the artistic director for jazz at the John F. Kennedy Center for the Performing Arts in Washington, D.C.

Taylor was a Jazz activist. He sat on the Honorary Founders Board of The Jazz Foundation of America. In 1989, Billy Taylor, Ann Ruckert, Herb Storfer and Phoebe Jacobs started The Jazz Foundation to save the homes and the lives of America's elderly jazz and blues musicians, later including musicians that survived Hurricane Katrina.

Billy Taylor was also one of the foremost jazz educators. He lectured in colleges, served on panels and travelled worldwide as a jazz ambassador. Critic Leonard Feather once said, "It is almost indisputable that Dr. Billy Taylor is the world's foremost spokesman for jazz."

Taylor was born in Greenville, North Carolina but moved to Washington, D.C. when he was five. He grew up in a musical family and learned to play different instruments as a child, including guitar, drums and saxophone. But he was most successful at the piano and took classical piano lessons with Henry Grant, the same teacher that had educated Duke Ellington a generation earlier. He made his first professional appearance playing keyboard at the age of 13 and the compensation was one dollar. Taylor attended Dunbar High School, America's first high school for African American students. He went to Virginia State College and majored in sociology. Pianist Dr. Undine Smith Moore noticed young Taylor's talent in piano and he changed his major to music, graduating with a degree in music in 1942.

Robert "Bobby" McFerrin, Jr. (born March 11, 1950) is a virtuoso American vocalist and conductor. He is best known for his 1988 hit song "Don't Worry, Be Happy". He is a ten-time Grammy Award winner. He is well known for his unique vocal techniques and singing styles.

Bobby McFerrin was born in Manhattan, New York City, the son of operatic baritone Robert McFerrin and singer Sara Copper. Robert Sr. was the first African American to be a regular with New York's Metropolitan Opera. Sara is a former soloist with regional opera companies and in Broadway shows, and is a professor emeritus of music at Fullerton College in Fullerton, California.

Bobby McFerrin married Debbie Green in 1975. They have three children.

McFerrin's song "Don't Worry, Be Happy" was a No. 1 U.S. pop hit in 1988 and won Song of the Year and Record of the Year honors. McFerrin has also worked in collaboration with instrumental performers, including pianists Chick Corea, Herbie Hancock, and Joe Zawinul, drummer Tony Williams, and cellist Yo-Yo Ma.

Barney Kessel (October 17, 1923 – May 6, 2004) was an American jazz guitarist born in Muskogee, Oklahoma, USA. Generally considered to be one of the greatest jazz guitarists of the 20th century, he was noted in particular for his vast knowledge of chords and inversions and chord-based melodies. He was a member of many prominent jazz groups as well as a "first call" guitarist for studio, film, and television recording sessions. Kessel was a member of the group of session musicians known as The Wrecking Crew.

Kessel began his career as a teenager touring with local dance bands before moving on to bands such as that led by Chico Marx. He quickly established himself as a key post-Charlie Christian jazz guitarist. In 1944 he participated in the film Jammin' the Blues, which featured Lester Young, and in 1947 he recorded with Charlie Parker's New Stars on the Relaxin' at Camarillo session for Dial Records. He is featured on the compilation Charlie Parker on Dial. He was rated the No. 1 guitarist in Esquire, Down Beat, and Playboy magazine polls between 1947 and 1960.