Mark Wirtz has been played on NTS shows including The Uline Catalog w/ Calvin LeCompte, with Caroline first played on 1 July 2021.

Mark Wirtz (born 3 September 1943 in Strasbourg, France, died 7 August 2020) was an Alsatian pop music record producer, composer, singer, musician, author, and comedian. As a producer, Wirtz's most famous output was from the mid to late 1960s, when he worked at Abbey Road Studios with Beatles engineer Geoff Emerick, under contract to EMI. Wirtz is chiefly known for the never-completed A Teenage Opera concept album. Another track by Wirtz, the 1966 "A Touch of Velvet, A Sting of Brass"…