Thanks to all who replied. I think Bob Hunt is on the right track. All along I've been thinking of the need to synchronize part of a music score (such as a predefined sax solo at the Bridge), with the lyrics so that I can pick up the vocal again at the Chorus. Since "MusicReader PDF" is just that -- it reads PDF files and, with a footpedal, "turns" the page, I got to thinking: why not combine the lyrics and the sax solo into a PDF document! I've already got my backup track (a .wav file) playing thru MediaMonkey or Windows Media Player, whatever, on my laptop. What I lacked is a manually-controllable lyrics / music score display. I believe MusicReader PDF is the answer. Now I need to determine whether to output it to my iPad or to a 2nd laptop. Nice dilemna to have!