INCLINE VILLAGE — A couple of centuries before “head-banging” became a known musical genre, there was was an instrument called a schlaggenfrappe which did just that. At least that’s how this story goes.The schlaggenfrappe, pastaphone, tuba mirum, ocarina and slide whistle will all be used along with more traditional instruments — piano, clarinet and violin — during “An Amazing Evening of Mostly American Music and Humor.”The performances will be Saturday, June 30 in the Toccata Performing Arts Theater at Incline Village and Monday, July 2 in a home on Kingsbury Grade. Soprano vocalist Anna Helwing will join the Trio Brio — David Brock, Pat Crane and Darrell Moore — for music of Scott Joplin, Aaron Copland and the mythical P.D.Q. Bach.“Darrell Moore, the instrument’s curator and performer, has meticulously and faithfully restored the schlaggenfrappe to its original condition, save for the modern augmentation of the auxiliary toilet paper dispenser, located on the right side of the instrument,” Brock said in an email to Lake Tahoe Action. “This particular instrument is believed to have originated about 1760, and was restored just in the last week. The detachable cardboard rolls are independently tuned, and sounded by striking the performer’s head.”Brock will play a pair of enduring ragtime piano