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Sachs, who was born in New York City, started as a young swing protégé of Benny Goodman, and later eased into bebop music, playing with Earl Fatha Hines. He then formed his own bands, with some success recording and touring. He married singer Helen Merrill in 1948, a union which lasted only a few years. Their only child was their son, Allan Preston Sachs, professionally known as Alan Merrill, was born in 1951.
In the 1960s, Aaron Sachs went into Latin music, playing with Machito, Tito Puente, and Tito Rodríguez. Sachs wrote a hit song for Tito Rodríguez, titled "El Mundo De Las Locas"  and he also composed for Louis Bellson, with the mainstay tune "Blast Off". Sachs also co-wrote with Henry Glover a popular song for the bandleader Machito, during the twist dance craze titled "Twist Changa" (Parts one and two), a double A-sided single in 1959 on Roulette Records.
Sachs recorded several solo albums. He has also recorded with Stan Getz, Sarah Vaughan, Chet Baker, Billie Holiday, Red Norvo, Gene Krupa, Anita O'Day, Cozy Cole, and many other significant artists in the jazz field.
Sachs died in New York on June 5, 2014, aged 90.
- Aaron Sachs Sextet (Bethlehem Records) (1954) 
- We Brought Our Axes (1954) 
- Jazzville, Vol. 3 (Dawn, Fresh Sound, 1957) 
- Clarinet and Co. (1957)
With Louie Bellson
- The Brilliant Bellson Sound (Verve, 1959)
With John Lewis
- The Modern Jazz Society Presents a Concert of Contemporary Music (Norgran, 1955)
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