Hello fellow-music-orgers!

I would really like to use something like lilypond to make music.  A basic requirement of mine is that it should render as score and play as sound simultaneously. See http://vimeo.com/16894001/ for a demo.  This is because I use it to teach singing to pelple with no musical background.

I use nted playing through timidity currently for this.  If there is some workflow involving lilypond for this that will be real cool.
Does anyone know of such?

Thanks
Rusi

PS. Sorry if this is OT but the recent entry of ob-lilypond into org prompts me to ask this.