dacapo (1.0) a Music app was the first published app of daCapo Apps and Products. It is a Music XML based Music score app that is able to import valid compressed music XML file (.mxl) and render it in your iPhone or iTouch. Due to its support of music xml  (vs. similar apps which uses pdf files), it is able to play the file  and adjust the speed if desired, also adjust the key (transpose) as  mentioned to match the singers voice, all from a single score. Changes are planned and should be  available shortly that will make the app more usable than it is right now.  The following slideshow is a short demo of how to start using it!