| This directory contains the BRLTTY speech driver for the Theta text to speech |
| engine from Cepstral [http://www.cepstral.com/]. It was implemented, and is |
| being maintained, by Dave Mielke <dave@mielke.cc>. |
| |
| BRLTTY's configure script automatically includes this driver if Theta has been |
| installed. The default is to check the directories /usr, /usr/local, |
| /usr/local/Theta, /usr/local/theta, /opt/Theta, and /opt/theta. The actual |
| location can be explicitly specified via --with-theta. |
| |
| This driver and that for the FestivalLite text to speech engine cannot be |
| linked into BRLTTY's binary at the same time (via --enable-speech-driver) |
| because their run-time libraries contain conflicting symbols. |
| |
| If this driver is built as a dynamically loaded shared object (the default), |
| i.e. it isn't linked into BRLTTY's binary via --with-speech-driver, then the |
| directory $THETA_HOME/lib must be added to the colon-delimited list of |
| directories in the LD_LIBRARY_PATH environment variable before BRLTTY is |
| started because Theta's own shared objects don't contain run-time search paths |
| for their internal dependencies. |
| |
| This driver recognizes the following parameters: |
| |
| Parameter Settings |
| age 1-99 (years) |
| gender male, female, neuter |
| language two-letter language code |
| name name (human), /path/to/directory |
| pitch -2.0-2.0 (octaves relative to default) |
| |
| If the human name of the voice is specified then the voice path is searched. |
| This path can be explicitly defined by storing a colon-delimited list of |
| directories in the THETA_VOXPATH environment variable. The default is to look |
| in $THETA_HOME/voices. |
