A movement in this musical form titled “Quaerendo invenietis” ("kway-REN-doh in-veh-nee-AY-tiss”) instructs a performer to turn their music upside down as if using a mirror. In a piece in this form, (10[1])the violins play dux (10[1])("DOOKS”) and comes ("COH-mez”) parts over an ostinato beginning (read slowly) “D, down to A, up to B, down (10[1])to F-sharp.” Every third movement except the last of J. S. (10[1])Bach’s (10[1])Goldberg Variations is in this form, whose “crab” type uses a (10[1])retrograde voice. A gigue (-5[1])("ZHEEG”) is paired with a piece in this form that features a bassline that is repeated 28 times. A round is a type (10[1])of this form in which the same melody is sung at different times. For 10 points, name this musical form of a widely performed (10[1])Johannes Pachelbel piece “in D.” ■END■