Burt Freeman Bacharach ( BAK-@-rak; born May 12, 1928) is an American composer, songwriter, record producer, pianist, and singer who has composed hundreds of popular hit songs from the late 1950s through the 1980s, many in collaboration with popular lyricist Hal David. A six-time Grammy Award winner and three-time Academy Award winner, Bacharach's songs have been recorded by more than 1,000 different artists. As of 2014, he had written 73 US and 52 UK Top 40 hits. He is considered one of the most important composers of 20th-century popular music.

Bacharach's music is characterized by unusual chord progressions, influenced by jazz harmony, with striking syncopated rhythmic patterns, irregular phrasing, frequent modulation, and odd, changing meters. He arranged, conducted, and produced much of his recorded output. Sometimes called "easy listening", he has expressed apprehension regarding that label. According to NJ.com contributor Mark Voger, "It may be easy on the ears, but it's anything but easy. The precise arrangements, the on-a-dime shifts in meter, and the mouthfuls of lyrics required to service all those notes have, over the years, proven challenging to singers and musicians." Bacharach's selection of instruments included flugelhorns, bossa nova sidesticks, breezy flutes, molto fortissimo strings and cooing female voices. According to editors of The Mojo Collection, it led to what became known as the "Bacharach Sound." He explains: I didn't want to make the songs the same way as they'd been done, so I'd split vocals and instrumentals and try to make it interesting ... For me, it's about the peaks and valleys of where a record can take you. You can tell a story and be able to be explosive one minute then get quiet as kind of a satisfying resolution. While he didn't mind singing during live performances, he tried to mostly avoid it on records. And when he did sing, he explains, "I try to sing the songs not as a singer, but just interpreting it as a composer and interpreting a great lyric that Hal [David] wrote." When performing in front of live audiences, he would often conduct while playing piano., as he did during a televised performance on The Hollywood Palace, where he played piano and conducted at the same time.

Using a quote from the above article, answer the following question: who did he work with the most?
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