When you build in a scheme interpreter into an
application, f.ex at
the bottom of ardour, you're not only doing it for the blind people,
you're also empowering the user.
ardour actually did have a scheme interpreter at the bottom at the
beginning of its life (Guile; a hangover from the design of quasimodo).
i never considered lisp to be an appropriate language for user
scripting, but beyond that, its presence at the top/bottom of the call
tree caused some technical problems that led me to remove it.
--p