Terry, thanks for the pointer to the Optical Character Recognition
mailing list.  It sounds like a good technical forum -- and not just a
long-winded bulletin board -- so I'll write and see what's happening.
Jody and I have investigated the structure of TIFF files, and agree
that this non-proprietary format is well-suited to store the
raster-scanned image of a music roll, with adequate spatial resolution
to recognize lyrics.

Via fax today I sent Shin Ohkura a sample of the lyrics stencilled on
an old "International Word Roll".  It will be a challenge, I think: the
paper was quite brown, and the blue ink had very little contrast.  The
next time I must experiment with yellow or orange gelatin filters.

-- Robbie Rhodes