Slide ‘o Mix Product Description Slide ‘o Mix was written for the Rotterdam Philharmonic Low Brass section. It is a typical opening fanfare, that can be played at any occasion. The brassy sound and vivid character make this arrangement a must have for every Low Brass group. Instrumentation 2 Tenor Trombones – 1 Bass Trombone – 1 Tuba * Can also be played with Trombone Quartet