David Leon Appell, born on March 24, 1922, in Philadelphia, Pennsylvania, was a prominent American musician, arranger, and record producer. He played a significant role in the music industry, particularly with the Cameo-Parkway record label, where he was a key figure alongside fellow Philadelphians Kal Mann and Bernie Lowe.

Appell's career began during World War II when he arranged music for United States Navy big bands, including Jimmie Lunceford's orchestra. Post-war, he arranged for notable dance orchestras such as those of Benny Carter and Earl "Fatha" Hines. He initially recorded with the Dave Appell Four, which later became known as The Applejacks, following a suggestion from Decca Records' Paul Cohen.

His work with Cameo Records in Philadelphia marked a high point in his career. Appell's band backed Charlie Gracie on hits like "Butterfly" and worked with artists such as Chubby Checker, Bobby Rydell, The Dovells, Dee Dee Sharp, and The Orlons. He co-wrote and produced numerous hits, including "Let's Twist Again" and "Mashed Potato Time," contributing significantly to the dance craze era of the 1960s.

In the 1970s, Appell found further success producing for Tony Orlando and Dawn, achieving #1 hits like "Knock Three Times" and "Tie a Yellow Ribbon Round the Ole Oak Tree." His later years saw him composing jazz-tinged pieces, collaborating with producer Billy Terrell and other musicians.

Dave Appell passed away on November 18, 2014, in Cherry Hill, New Jersey. He left behind a rich musical legacy, remembered fondly by his family and the music community. His daughter Roz Appell recalls his passion and talent, emphasizing the lasting impact of his work.