I found that “.q” makes a sound that is different from others, but isn’t documented anywhere…
In Synthesizer V Studio Basic\clf-data\english-arpabet-phones.txt, there’s all the phonemes, and one of the line just says “q stop”. When i try to make Tsurumaki Maki (ENG Lite) say “.q iy”, she says something similar to hh iy (or hh ih, i can’t hear the difference)… I can’t see any word using it, and it’s clearly not a vowel. It may come from another language, for compatibility purposes, but I can’t tell what phoneme it is. If anyone know, please tell me !
EDIT : I tried other phonemes, and .q eh gives y eh, same for .q aa giving me y aa… .aa q aa give aa n aa, I’m completly at loss here.
It seems the output of
q is not consistent across voice libraries. I tried with a few and got 3-4 completely different results with the exact same phonemes.
aa q Eleanor Forte lite treats it as a more immediate stop than
cl, Maki Standard trails off into an
n sound, and the English AI voices seem to trail off into a
Based on ARPABET - Wikipedia it seems “Q” is supposed to represent a glottal stop in arpabet. Since SynthV uses
cl for this instead, we can probably safely assume that at some point in early development they switched from
cl but left it in the list for compatibility reasons. It would also explain why only Eleanor Forte lite (the oldest English voice) treats the phoneme correctly.