Problem: Background: Frank Vincent Zappa (December 21, 1940 - December 4, 1993) was an American musician, composer, activist and filmmaker. His work is characterized by nonconformity, free-form improvisation, sound experiments, musical virtuosity, and satire of American culture. In a career spanning more than 30 years, Zappa composed rock, pop, jazz, jazz fusion, orchestral and musique concrete works, and produced almost all of the 60-plus albums that he released with his band the Mothers of Invention and as a solo artist. Zappa also directed feature-length films and music videos, and designed album covers.
Context: Zappa was born on December 21, 1940 in Baltimore, Maryland. His mother, Rosemarie (nee Collimore) was of Italian (Neapolitan and Sicilian) and French ancestry; his father, whose name was anglicized to Francis Vincent Zappa, was an immigrant from Partinico, Sicily, with Greek and Arab ancestry. Frank, the eldest of four children, was raised in an Italian-American household where Italian was often spoken by his grandparents. The family moved often because his father, a chemist and mathematician, worked in the defense industry. After a time in Florida in the 1940s, the family returned to Maryland, where Zappa's father worked at the Edgewood Arsenal chemical warfare facility of the Aberdeen Proving Ground. Due to their home's proximity to the arsenal, which stored mustard gas, gas masks were kept in the home in case of an accident. This had a profound effect on Zappa, and references to germs, germ warfare and the defense industry occur throughout his work. Zappa was often sick as a child, suffering from asthma, earaches and sinus problems. A doctor treated his sinusitis by inserting a pellet of radium into each of Zappa's nostrils. At the time, little was known about the potential dangers of even small amounts of therapeutic radiation, and although it has since been claimed that nasal radium treatment has causal connections to cancer, no studies have provided significant enough evidence to confirm this. Nasal imagery and references appear in his music and lyrics, as well as in the collage album covers created by his long-time collaborator Cal Schenkel. Zappa believed his childhood diseases might have been due to exposure to mustard gas, released by the nearby chemical warfare facility. His health worsened when he lived in Baltimore. In 1952, his family relocated for reasons of health. They next moved to Monterey, California, where his father taught metallurgy at the Naval Postgraduate School. They soon moved to Claremont, California, then to El Cajon, before finally settling in San Diego.
Question: When did he get interested in music?
Answer:

Background: Steely Dan is an American rock band founded by core members Walter Becker (guitars, bass, backing vocals) and Donald Fagen (keyboards, lead vocals) in 1972. Blending elements of jazz, traditional pop, R&B, and sophisticated studio production with cryptic and ironic lyrics, the band enjoyed critical and commercial success starting from the early 1970s until breaking up in 1981. Throughout their career, the duo recorded with a revolving cast of session musicians, and in 1974 retired from live performances to become a studio-only band. Rolling Stone has called them "the perfect musical antiheroes for the Seventies".
Context: The Royal Scam was released in May 1976. Partly because of Carlton's prominent contributions, it is the band's most guitar-oriented album. It also features performances by session drummer Bernard Purdie. The album sold well in the U.S.A., though without the strength of a hit single. "Haitian Divorce" (Top 20) drove sales in the UK, becoming Steely Dan's first major hit in that country. Steely Dan's sixth album, the jazz-influenced Aja, was released in September 1977. Aja reached the Top Five in the U.S. charts within three weeks, winning the Grammy award for "Engineer - Best Engineered Recording - Non-Classical." It was also one of the first American LPs to be certified 'platinum' for sales of over 1 million albums. Featuring Michael McDonald's backing vocals, "Peg" (No. 11) was the album's first single, followed by "Josie" (No. 26) and "Deacon Blues" (No. 19). Aja solidified Becker's and Fagen's reputations as songwriters and studio perfectionists. It features such jazz and fusion luminaries as guitarists Larry Carlton and Lee Ritenour; bassist Chuck Rainey; saxophonists Wayne Shorter, Pete Christlieb, and Tom Scott; drummers Steve Gadd, Rick Marotta and Bernard Purdie; pianist Joe Sample and ex-Miles Davis pianist/vibraphonist Victor Feldman and Grammy award-winning producer/arranger Michael Omartian (piano). Planning to tour in support of Aja, Steely Dan assembled a live band. Rehearsal ended and the tour was canceled when backing musicians began comparing pay. The album's history was documented in an episode of the TV and DVD series Classic Albums. After Aja's success, Becker and Fagen were asked to write the title track for the movie FM. The movie was a box-office disaster, but the song was a hit, earning Steely Dan another engineering Grammy award. It was a minor hit in the UK and barely missed the Top 20 in the U.S.A.
Question: When did the band release Aja?
Answer:
Steely Dan's sixth album, the jazz-influenced Aja, was released in September 1977.