Composer Ema Quiñones (Facebook video via Victory Players) By PEGGY ANN BLISS Special to The STAR It will be a toss-up as to who will be more tickled Saturday when the Puerto Rico Symphony Orchestra (PRSO) unveils a world premiere of 24-year-old Ema Quiñones’ concerto “Contrastes Caribenos”: soloist Andrés Maldonado, the debuting composer, the 70-year-old orchestra, its Spanish-American guest conductor or the audience itself. With Maldonado, 33, and Quiñones both being clarinetists AND…
