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-
-app_festival is an application that allows one to send text-to-speech commands
-to a background festival server, and to obtain the resulting waveform which
-gets sent down to the respective channel. app_festival also employs a waveform 
-cache, so invariant text-to-speech strings ("Please press 1 for instructions") 
-do not need to be dynamically generated all the time. 
-
-You need : 
-
-1) festival, patched to produce 8khz waveforms on output. Patch for Festival
-1.4.2 RELEASE are included. The patch adds a new command to festival 
-(asterisk_tts). 
-
-It is possible to run Festival without patches in the source-code. Just
-add this to your /etc/festival.scm or /usr/share/festival/festival/scm:
-
-    (define (tts_textasterisk string mode)
-    "(tts_textasterisk STRING MODE)
-    Apply tts to STRING. This function is specifically designed for
-    use in server mode so a single function call may synthesize the string.
-    This function name may be added to the server safe functions."
-    (let ((wholeutt (utt.synth (eval (list 'Utterance 'Text string)))))
-    (utt.wave.resample wholeutt 8000)
-    (utt.wave.rescale wholeutt 5)
-    (utt.send.wave.client wholeutt)))
-
-[See the comment with subject "Using Debian
- festival >= 1.4.3-15 (no recompiling needed!)" on
- http://www.voip-info.org/wiki-Asterisk+festival+installation for the
- original mentioning of it]
-
-2) You may wish to obtain and install the asterisk-perl
-module by James Golovich <james@gnuinter.net>, from 
-either CPAN, or his site: http://asterisk.gnuinter.net,
-as this contains a good example of how variable text
-can be tts'd via asterisk, namely the examples/tts-*.agi
-files there. It has been noted that the current expression
-evaluation capabilities of asterisk are not best suited
-for the generation and manipulation of text. AGI scripting
-can be ideal for these sorts of needs. For simpler usage,
-fixed, pre-recorded messages may be more amenable for your
-purposes.
-
-3) Before running asterisk, you have to run festival-server with a command 
-like : 
-
-/usr/local/festival/bin/festival --server > /dev/null 2>&1 &