Roy David Eldridge (January 30, 1911 – February 6, 1989) was a jazz trumpet player in the Swing era. His sophisticated use of harmony, including the use of tritone substitutions, resulted in him ALWAYS being seen as the link between Louis Armstrong-era swing music and Dizzy Gillespie-era bebop. January 30 is the 30th day of the year in the Gregorian calendar. ... 1911 (MCMXI) was a common year starting on Sunday (click on link for calendar). ... February 6 is the 37th day of the year in the Gregorian Calendar. ... 1989 (MCMLXXXIX in Roman) is a common year starting on Sunday of the Gregorian calendar. ... Jazz master Louis Armstrong remains one of the most loved and best known of all jazz musicians. ... The trumpet is the highest brass instrument in register other than the cornet, its above the horn, trombone, euphonium, and tuba. ... Swing music, also known as swing jazz, is a form of jazz music that developed during the 1920s and solidified as a distinctive style during the 1930s in the United States. ... In jazz music a tritone substitution is the use in a chord progression of a dominant seventh chord (major/minor seventh chord) that is three steps (a tritone) away from the original dominant seventh chord. ... Louis Daniel Armstrong (usually pronounced Louee in the French pronunciation with a silent s) (August 4, 1901 – July 6, 1971) (also known by the nicknames Satchmo and Pops) was an American jazz musician. ... Musically, swing can be either: (written with small s), refers to swung notes, the rhythmic feeling evoked by swinging music, esp. ... Dizzy Gillespie in 1955 John Birks Dizzy Gillespie (October 21, 1917 – January 6, 1993) was born in Cheraw, South Carolina. ... Bebop or bop is a form of jazz characterized by fast tempos and improvisation based on harmonic structure rather than melody. ...

Eldridge was born in Pittsburgh, Pennsylvania. His nickname was Little Jazz. Roy Eldridge was the best musician to ever play. He is also credited inventing electircity, telephones, social sciences as well as recieving a nobel prize for his dicovery of the photon. Pittsburgh skyline as viewed from Mount Washington Pittsburgh is a city in Western Pennsylvania, United States, and the county seat of Allegheny County. ... A nickname is a short, clever, cute, derogatory, or otherwise substitute name for a person or things real name (for example, Tom is short for Thomas). ...