Felix Miata wrote:

> /usr/share/festival/voices/

$ ls -al /usr/share/festival/voices/english/kal_diphone/
total 16
drwxr-xr-x 4 root root 4096 Mar 20  2015 .
drwxr-xr-x 3 root root 4096 Mar 20  2015 ..
drwxr-xr-x 2 root root 4096 Mar 20  2015 festvox
drwxr-xr-x 2 root root 4096 Mar 20  2015 group


$ dpkg -l | grep festi
ii  festival                               1:2.1~release-8                     
amd64        General multi-lingual speech synthesis system
ii  festvox-kallpc16k                      1.4.0-5                             
all          American English male speaker for festival, 16khz sample rate

But I don't hear anything and I have old left over MBROLA from 2009 with
german

ls -al /usr/local/MBROLA/
total 1720
drwxr-sr-x  8 root    staff     4096 Dec 13  2009 .
drwxrwsr-x 11 root    staff     4096 Dec 13  2009 ..
drwxr-sr-x  2 root    staff     4096 Dec 13  2009 data
drwxr-sr-x  3 root    staff     4096 Dec 13  2009 de1
drwxr-sr-x  3 root    staff     4096 Dec 13  2009 de2
drwxr-sr-x  3 root    staff     4096 Dec 13  2009 de3
drwxr-sr-x  3 root    staff     4096 Dec 13  2009 de5


Anyway at least I can see the default kal_diphone - I think you should
install 1-2 of those festival voices
I don't recall anymore what was the trick to make mbrola work