On June 17 eMusic will release Super Gold Greatest Hits, the first full-length album by Mingering Mike, the mysterious D.C. resident and self-declared soul superstar. (Jeffry Cudlin wrote a fine piece about Mingering Mike’s story and fascinating record covers last year.) Four of the album’s 11 tracks are now available on the Mingering Mike Web site. (Click on “MingerPlayer.”) The album was apparently recorded in the late ’60s—-which means, on the evidence of “Darlene, Come on Back,” dude invented beatboxing.