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asterisk/contrib
History
Naveen Albert b81fbbc6dc
res_pjsip_outbound_registration: Make max random delay configurable. 		3 years ago
..
ast-db-manage res_pjsip_outbound_registration: Make max random delay configurable. 3 years ago
docker Add initial support to build Docker images 10 years ago
editors contrib/editors: Fix vim syntax highlighting of comments in config files 11 years ago
init.d contrib: Spelling fixes 4 years ago
scripts ast_coredumper: Fix deleting results when output dir is set 4 years ago
systemd contrib/systemd: Added note on common issues with systemd and asterisk 5 years ago
thirdparty
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unistimLang Add French translation for chan_unistim phones on-screen menus. 13 years ago
upstart Remove as much trailing whitespace as possible. 8 years ago
utils contrib: Spelling fixes 4 years ago
Makefile refdebug: Create refstats.py script. 7 years ago
README.festival Remove as much trailing whitespace as possible. 8 years ago
asterisk-ices.xml Remove as much trailing whitespace as possible. 8 years ago
dictionary.digium
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festival-1.4.1-diff
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festival-1.4.2.diff
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festival-1.4.3.diff
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festival-1.95.diff
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i18n.testsuite.conf
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valgrind-RedHat-8.0.supp
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valgrind.supp contrib/valgrind: Fix use of frame-level suppression 6 years ago

README.festival 

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 &