Disklavier

Thanks all for these helpful suggestions.

I have been experimenting with a free trial copy of Sony's Acid Music Studio 8. While I'm no expert, the program is impressive to me.

I also recently learned about Midiplay, a free Windows program available at http://freespace.virgin.net/chris.crhills/midiplay/index.html.  I haven't tried it yet, but I am told that it displays the score and shows the position in the score while it's playing the music.