The American composer and musical comedian Peter Schickele, who turned 80 this year, celebrates the 50th

“[S]o beloved is Mr. Schickele among musicians,” The New York Times’ James R. Oestreich reports, that to recruit his New York Pick-Up Ensemble of 35 players, “he needed to make only 36 phone calls.”
http://www.nytimes.com/2015/12/20/arts/music/peter-schickele-brings-pdq-bach-back-to-the-stage.html
Schickele’s comic alter ego continues to produce unheard(-of) works, including a concerto for pianist Jeffrey Biegel, Oestreich writes. “[A]s Mr. Schickele pointed out, P. D. Q. is the only dead composer who still accepts commissions.”