Publisher Desc.  Just slip this CD into your player for an instant, professional accompaniment to the printed solo part! Additional backing tracks suitable for all C, B flat and E flat instruments. The CD also contains feature-packed multimedia for use on your PC or Macintosh. Use it to print out other parts. Then, using the MIDI player included (PC only), you can remove and add parts on the recording, and change the speed. You can even change the instruments.