I am impressed with the progress that has been made with reproducing choral singing and WordBuilder is a significant advance. I congratulate you, John, with how well you have mastered this complex system.
It reminds me of the time 40 years ago when I was working to get a Commodore Pet to play a simple keyboard piece through a homemade DAC. The programming in assembly language was tedious. It was more computer science than music. I get the same feeling here that what is required is a mastery of sound engineering.
As an musician, I want to spend my time writing. I would love to have an easy way to produce sample choral recordings but I don’t think we are quite there yet.
The central problem seems to be getting the computer to correctly pronounce a notoriously inconsistent language - how do you pronounce knife? - by interpreting the written language. Why has no-one thought to build software based on input from sound rather than writing, to utilize the advances in speech recognition? If you sang the text on a monotone in rhythm, a sound analysis module should be able to select the best matches from the sound library and recreate it with the correct pitches from Dorico as choral singing. I may be totally off base here but I suspect this approach could avoid most of the machinations at the granular level required to get a realistic sounding result.
Thanks for sharing,