You're talking about the version of
Software Automatic Mouth that was ported to the Mac. I'm well aware of the program, as I've read and documented the disassembled source code,
and written a version in
Lua that can sing.

The later versions of SAM are very intelligible and even capable of
singing fairly well.. I'd gotten a hold of the company a number of years ago in hopes of convincing them that perhaps using them with BiaB (I've got some code that will convert between MusicXML and other formats). But that never panned out.
