When I load any of the notation instruments of Jazz and Big Band in Sonar 8.5 Producer Edition, there seems to be a problem with the polyphony. Am I right that these instruments are supposed to let you produce chords with a keyboard controller? The reason why I ask this is because I've written music that has chords for some parts, and it seems that the loaded instruments will only let me hear one note at a time. How do I fix this?