I'm trying to use csound to process pre-recorded speech to emulate the
classic Texas Instruments speak&spell sound.

Here's an example of the speak&spell speech: (87k, 16bit 8khz)
http://members.xoom.com/icefog/Speakn.au
(your browser's plugin might not play this correctly, you may have to
download it.)

The lpc or melp compression schemes sound as though they'd serve my
purposes, and I suspect there's a way to coax it out of csound, though
as a first-time user I'm a bit intimidated.
More samples of lpc and melp are at:
http://www.ti.com/sc/docs/msp/speech/demo.htm

Info on the Speak&Spell:
http://www.ti.com/corp/docs/history/pmosnf.htm

If anyone has suggestions, hints, pointers toward tutorials or relevant
examples, or any previous experience with this sort of thing I'd be very
grateful for your help.

PJ Richardson