We're spending the week at Chamber Music Northwest, in Portland, Ore. Today, host Fred Child is on stage at Kaul Auditorium with violinists (and sisters) Ida and Ani Kavafian and pianist Anne-Marie McDermott. The trio plays the opening movement from the Suite No. 2 for Two Violins and Piano, Op. 71 by Moritz Moszkowski. Then clarinetist David Shifrin, violist Paul Neubauer and cellist Fred Sherry join the Kavafian sisters.