The Florestan Trio is back at PSU with guest performer Theodore Arm on viola. The Trio, including Janet Guggenheim on piano, Carol Sindell on violin and Hamilton Cheifetz on cello, will perform two selections: Beethoven's "Archduke Trio" and Brahms "Quartet for Piano and Strings in G minor." The members of the Trio often play at Rose Schnitzer Manor, Jewish community events and Robison Home. $25 general, $20 seniors and student pricing available. To purchase tickets call the Portland State University box office at 503-725-3307. 4 pm. PSU Lincoln Hall, 1620 SW Park Ave.