Our Colleagues at the CESR have made some excellent progress towards a working model of the site. Follow the link below and see what you think of the basic functions, layout. Of course there will be changes, but this should give a sense of how things work.
So far, you can search (but only the Premier livre has full images and transcriptions), scroll through books, toggle among the voice parts, download PDFs, and download transcriptions.
If you would like to PLAY the transcriptions using Sibelius Scorch player, you will need to install the Scorch player using the link below.