I recently installed Wine according to this answer and “Balabolka”, a very good TTS program that runs smoothly under Windows, afterwards. Wine did not install SAPI 4 or SAPI 5 voices which are required to use the program. So, I downloaded a free German (Steffi) and a free British English (Emily) SAPI 5 voice and installed them as well.
Unfortunately, Balabolka does not recognise these voices although they are installed. What can I do? Usually, Balabolka should be able to detect the voices automatically. But this does not work under Ubuntu. Furthermore, Balabolka does not seem to have an option which enables the user to manually select the installed voices if they are not detected by Balabolka itself.
Edit 1: I just saw that there is an option where one could (theoretically) select different voices but the option is greyed out.
Edit 2: It seems to be possible to install SAPI 4 voices so that Balabolka recognises them but I do not know how this can be achieved. I tried installing a SAPI 4 voice but it did not show up when I started the program. Having a SAPI 4 voice, however, would be at least better than having no solution at all.