For the concert hall, Flaherty wrote the music for “With Voices Raised” (text by Lynn Ahrens), which was commissioned by the Boston Pops Orchestra in 1999. It had its world premiere in Boston on July 4, 1999, which was nationally televised, featuring Senator Ted Kennedy as one of the speakers. It was subsequently released on the Pops’ recording “A Splash Of Pops” on the RCA Victor Label, July 13, 1999 .He also wrote the music for the "American River Suite", with lyrics by Bill Schermerhorn and commissioned by Macy's. The piece premiered in April 2009 at Carnegie Hall by the New York Pops and sung by Idina Menzel, Anika Noni Rose, and the children's chorus from the Choir Academy of Harlem. It was broadcast nationally on the Fourth of July of that same year.