I load my first piece with Noteperformer and a soprano solo, I then go through all the Cantai steps, and the soprano comes up fine. The next piece I do the same setup only this time it’s a tenor solo instead of the soprano solo and I don’t get a vocal sound, even though it renders in Cantai. Does anyone know why by any chance?
When I first downloaded Cantai, I tried it out for a measure or two by itself, and it produced vocal with lyrics.
Today, I created a Cantai + NP Playback Template, assigned it to a real song, and only heard sine tones.
On restarting Dorico and re-opening the song I could see the voices loading
but could not change any of hte singers from Violetta, nor could I hear anything but sine tones.
Can anyone think of what I have left out?
In the playback template you have Cantai on the top?
Make sure the pre-roll setting on the Timing page of Library > Playback Options is set to 0.
I think there was some reference to having a bar or two before the first bar/first beat your singer sings, if this is relevant. (Might related to pre-roll now I think about it, as Daniel has mentioned.) Also I do not know if the Cantai singers can sing out of a normal range, just check your tenor note range.
I find sometimes the singers do not work, and have to play around with singers, or save, open again etc.
You could change to another singer and see if you hear it after rendering.
The pre-roll has been set to zero from the start.
I cannot change singers; the voice just pops back to Violetta no matter what I choose.
It’s a mystery.
I think what’s throwing things off slightly for me is the registers the voices are written in. I had written a tenor part and normally the tenor is written in treble clef and sounds an octave lower. Cantai couldn’t deal with that so once I put the part down an octave to be written where it sounds, the tenor played. But that is incorrect notation in solo vocal writing. In choral writing it’s okay to have the tenors in bass clef. I haven’t tried that with Cantai yet.
I tried another song (for Tenor and only one voice) and it did produce sung lyrics.
I can see what some have mentioned about moving end consonants from the end of one syllable to the start of the next. I also note consistent difficulty with -ing endings.
Still, what Cantai can do at this stage is impressive and very promising.
So, there is a tenor clef which is the G-clef with an 8 below it. You notate in the treble clef but it plays an octave lower.
Oh, I know that, but it doesn’t look too good on a finished score.
No judgment here. I was trained to use that clef because most choral literature uses it. If you do use that clef, I was just clarifying that Dorico plays the tenor in the appropriate octave. Best of luck.
Yes, I would prefer to have the “g” included on “-ing” and spell it "-in’ " if I didn’t want to hear it! 
Not sure how you did your “fix”; did you notate it an octave lower, or go to setup and “change instrument”? In setup, when you select the tenor voice, you can specify the octave shift. Does Cantai not recognize that?
-- Jim
I applied Cantai to an existing piece that already had the Tenor voice and Clef configured to sound in the tenor register.
There is also a Notation Option for each flow
„Respect Octave Indicator“*
This might also play into Cantai’s implementation, I have not tried it though.
*You can go to the Clefs section, and set “Clefs with octave indicators” to “Respect octave indicator”