[3] He earned $65 per week for the symphony's 28-week season, plus a seven-week summer session, a respectable income for the Great Depression, especially for a teenager.
Sopkin served together with other musicians in the United States Army Air Forces during World War II in Orlando, Florida.
[2] After returning from military service, the Fine Arts Quartet was revived, operating in Chicago under the auspices of the American Broadcasting Company.
[2] Sopkin left the Fine Arts Quartet in 1979 following a hand injury and a detached retina, but continued to make occasional guest appearances with the group.
Sopkin's efforts led to bringing students to Maine early so that they could perform in area schools before the summer programs began.