The Face of The Voice
Hey y'alls--who else loves the voices of the speakers??? I just love my Danish "teacher" so much, the Esperanto dude, I love the French man and woman, and I could listen to the Spanish woman say "Patricia" all day long. Wish I had faces to connect with the voices I have come to love!! AND and big thanks to everyone who makes this possible <3
The Esperanto voice is human.
Scroll past the initial comment at the following link and you can see his answers to a few questions with the Duolingo account fsoghomonian: https://www.duolingo.com/comment/9588832
He also has a youtube channel/account: https://youtube.com/user/fsoghomonian
As far as I know, the Danish, French, and Spanish voices are all Text To Speech.
I don't think Duolingo have an official page listing which courses are TTS and which are human voice. In general, when you get a listening exercise, if it can't be played at a slow speed, it is a human voice.
I think that these are the current human voice courses:
I have checked these against comments in the incubator: https://incubator.duolingo.com as well as I am able. Swahili has had sentences recorded with a human voice, but I am unsure if the audio has been released yet. Any of the non-natural languages such as High Valyrian and Klingon will almost certainly have human voice when audio is added.
The voices in Labs > Stories (for Spanish and Portuguese) are also human.