Aldebaran documentation What's new in NAOqi 2.4.3?

ALTextToSpeech API

NAOqi Audio - Overview | API | Tutorial

Namespace : AL

#include <alproxies/altexttospeechproxy.h>

Methods

bool ALTextToSpeechProxy::addToDictionary(const std::string& word, const std::string& pronunciation)

Nuance only.

Changes the pronunciation of a word in the current language. The new pronunciation is stored on the robot, so it will remained even if the robot is switched off.

Parameters:
  • word – word to change.
  • pronunciation – new pronunciation of the word.
Returns:

true if succeeded otherwise false

altexttospeech_userdictionary.py

#! /usr/bin/env python
# -*- encoding: UTF-8 -*-

"""Example: Use Dictionary TTS Methods (English)"""

import qi
import argparse
import sys


def main(session):
    """
    This example uses the Dictionary TTS methods (English).
    It adds and removes words in the dictionary from the module.
    """
    # Get the service ALTextToSpeech.

    tts = session.service("ALTextToSpeech")

    tts.setLanguage("English")
    # Say Emile in english
    tts.say("My name is Emile.")

    # Add Emile to dictionary
    tts.addToDictionary("Emile", "\\toi=lhp\\E'mil\\toi=orth\\")

    # Test it
    tts.say("My name is Emile.")

    # Delete the word Emile
    tts.deleteFromDictionary ("Emile")

    # Re-test it
    tts.say("My name is Emile.")


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--ip", type=str, default="127.0.0.1",
                        help="Robot IP address. On robot or Local Naoqi: use '127.0.0.1'.")
    parser.add_argument("--port", type=int, default=9559,
                        help="Naoqi port number")

    args = parser.parse_args()
    session = qi.Session()
    try:
        session.connect("tcp://" + args.ip + ":" + str(args.port))
    except RuntimeError:
        print ("Can't connect to Naoqi at ip \"" + args.ip + "\" on port " + str(args.port) +".\n"
               "Please check your script arguments. Run with -h option for help.")
        sys.exit(1)
    main(session)
bool ALTextToSpeechProxy::addToDictionary(const std::string& type, const std::string& word, const std::string& priority, const std::string& phonetic, const std::string& accent)

Japanese only.

Add the specific string in the dictionary with its type, pronunciation and priority. Changes the pronunciation of a word. The new pronunciation is stored on the robot, so it will remained even if the robot is switched off.

Parameters:
  • type – the word type (名詞-一般, 名詞-固有名詞-人名-一般, 名詞-固有名詞-人名-姓, 名詞-固有名詞-人名-名, 名詞-固有名詞-地域-一般, 名詞-固有名詞-一般, 名詞-サ変接続, 名詞-形容動詞語幹, 記号-一般)
  • word – the word to add in Hiragana, katakana or kanji.
  • priority – the priority of the word(1 to 9999).
  • phonetic – the word phonetic : same as word in KATAKANA..
  • accent – the accentuation of the chosen syllabus.
Returns:

true if succeeded otherwise false

altexttospeech_userdictionary.py

#! /usr/bin/env python
# -*- encoding: UTF-8 -*-

"""Example: Use Dictionary TTS Methods (Japanese)"""

import qi
import argparse
import sys


def main(session):
    """
    This example uses the Dictionary TTS methods.
    It adds and removes words in the dictionary from the module.
    """
    # Get the service ALTextToSpeech.

    tts = session.service("ALTextToSpeech")
    try :
        tts.setLanguage("Japanese")
    except RuntimeError:
        print "You need to install Japanese language in order to hear correctly these sentences."
    #Check the pronunciation before changing the dictionary
    tts.say("日本語")

    #Add the word  おはよう
    tts.addToDictionary("名詞-一般","日本語","2000" , "ニホンゴ","3-4:*")

    #Test it
    tts.say("日本語")

    #Delete this word in the dictionary to reset the pronunciation
    tts.deleteFromDictionary ("名詞-一般","日本語")

    #Re-test it
    tts.say("日本語")


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--ip", type=str, default="127.0.0.1",
                        help="Robot IP address. On robot or Local Naoqi: use '127.0.0.1'.")
    parser.add_argument("--port", type=int, default=9559,
                        help="Naoqi port number")

    args = parser.parse_args()
    session = qi.Session()
    try:
        session.connect("tcp://" + args.ip + ":" + str(args.port))
    except RuntimeError:
        print ("Can't connect to Naoqi at ip \"" + args.ip + "\" on port " + str(args.port) +".\n"
               "Please check your script arguments. Run with -h option for help.")
        sys.exit(1)
    main(session)
bool ALTextToSpeechProxy::deleteFromDictionary(const std::string& word)

Nuance only.

Deletes the word from the user dictionary.

Parameters:
  • word – word to delete, encoded in UTF-8.
Returns:

true if succeeded otherwise false
bool ALTextToSpeechProxy::deleteFromDictionary(const std::string& type, const std::string& word)

Japanese only.

Deletes the word according to its type from the japanese user dictionary.

Parameters:
  • word – the word to delete in Hiragana, katakana or kanji.
  • type – the word type (noun, verb, ...)
Returns:

true if succeeded otherwise false
std::vector<std::string> ALTextToSpeechProxy::getAvailableLanguages()

Returns the list of the languages currently installed on the system.

Example: [‘French’, ‘Chinese’, ‘English’, ‘German’, ‘Italian’, ‘Japanese’, ‘Korean’, ‘Portuguese’, ‘Spanish’]

Returns:List of installed languages (language names are given in English)

altexttospeech_getavailablelanguages.py

#! /usr/bin/env python
# -*- encoding: UTF-8 -*-

"""Example: Use getAvalaibleLanguages Method"""

import qi
import argparse
import sys


def main(session):
    """
    This example uses the getAvailableLanguages method.
    It gets the list of languages available in the module.
    """
    # Get the service ALTextToSpeech.

    tts = session.service("ALTextToSpeech")

    #Lists the available languages
    lang = tts.getAvailableLanguages();
    print "Available languages: " + str(lang)


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--ip", type=str, default="127.0.0.1",
                        help="Robot IP address. On robot or Local Naoqi: use '127.0.0.1'.")
    parser.add_argument("--port", type=int, default=9559,
                        help="Naoqi port number")

    args = parser.parse_args()
    session = qi.Session()
    try:
        session.connect("tcp://" + args.ip + ":" + str(args.port))
    except RuntimeError:
        print ("Can't connect to Naoqi at ip \"" + args.ip + "\" on port " + str(args.port) +".\n"
               "Please check your script arguments. Run with -h option for help.")
        sys.exit(1)
    main(session)
std::vector<std::string> ALTextToSpeechProxy::getAvailableVoices()

Returns the list of the voices currently installed on the system. Each voice is given in English.

Returns:Voices Installed
std::string ALTextToSpeechProxy::getLanguage()

Returns the language currently used by the text to speech engine.

Example: ‘French’

Could be one of the available languages.

For further details, see: ALTextToSpeechProxy::getAvailableLanguages.

Returns:Current language used by the text to speech engine
float ALTextToSpeechProxy::getParameter(const std::string& parameter)

Returns the value of one of the text to speech engine parameters. The available parameters are: “pitchShift”, “doubleVoice”,”doubleVoiceLevel” and “doubleVoiceTimeShift”. Please refers to ALTextToSpeechProxy::setParameter for details about this parameters.

Parameters:
  • parameter – Name of the parameter
Returns:

Value of the specified parameter
std::vector<std::string> ALTextToSpeechProxy::getSupportedLanguages()

Returns the list of all supported languages.

Example: [‘French’, ‘Chinese’, ‘English’, ‘German’, ‘Italian’, ‘Japanese’, ‘Korean’, ‘Portuguese’, ‘Spanish’]

Returns:List of supported languages (language names are given in English) 
#! /usr/bin/env python
# -*- encoding: UTF-8 -*-

"""Example: Use getSupportedLanguages Method"""

import qi
import argparse
import sys


def main(session):
    """
    This example uses the getSupportedLanguages method.
    It gets the list of supported languages by the module.
    """
    # Get the service ALTextToSpeech.

    tts = session.service("ALTextToSpeech")

    #Lists the supported languages
    lang = tts.getSupportedLanguages();
    print "Supported languages: " + str(lang)


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--ip", type=str, default="127.0.0.1",
                        help="Robot IP address. On robot or Local Naoqi: use '127.0.0.1'.")
    parser.add_argument("--port", type=int, default=9559,
                        help="Naoqi port number")

    args = parser.parse_args()
    session = qi.Session()
    try:
        session.connect("tcp://" + args.ip + ":" + str(args.port))
    except RuntimeError:
        print ("Can't connect to Naoqi at ip \"" + args.ip + "\" on port " + str(args.port) +".\n"
               "Please check your script arguments. Run with -h option for help.")
        sys.exit(1)
    main(session)
std::string ALTextToSpeechProxy::getVoice()

Returns the voice currently used by the text to speech engine.

Returns:Name of the current voice
float ALTextToSpeechProxy::getVolume()

Gets the current gain applied to the signal synthesized by the text to speech engine. The default value is 1.0.

Returns:Volume [0 - 1]
void ALTextToSpeechProxy::loadVoicePreference(const std::string& preferencesFileSuffix)

Deprecated since version 2.3: Please use ALTextToSpeechProxy::setParameter to change the settings of the voice. To save your settings please use ALPreferenceManager. For further details see ALPreferenceManager.

Loads a voice and the related set of voice parameters defined in a XML file contained in the preferences folder. The name of the XML file must be of the form ALTextToSpeech_Voice_preferencesFileSuffix. The official voice in each language is defined in this way. Please refers to Tutorial for further details.

Parameters:
  • preferencesFileSuffix – Name of the voice preference file
std::string ALTextToSpeechProxy::locale()

Returns the locale associated to the current language set on the robot. The format is xx_XX (examples: en_US, fr_FR, ja_JP, de_DE, ...)

Returns:The current locale associated to the current language.
void ALTextToSpeechProxy::resetSpeed()

Reset the speed of the speech to the value stored in the parameter defaultVoiceSpeed.

void ALTextToSpeechProxy::say(const std::string& stringToSay)

Says the specified string of characters.

Uses the language defined using ALTextToSpeechProxy::setLanguage if any, or the default language defined in the robot’s web page.

Parameters:
  • stringToSay – Text to say, encoded in UTF-8.

altexttospeech_say.py

#! /usr/bin/env python
# -*- encoding: UTF-8 -*-

"""Example: Use say Method"""

import qi
import argparse
import sys


def main(session):
    """
    This example uses the say method.
    It makes the robot say some text using the module.
    """
    # Get the service ALTextToSpeech.
    tts = session.service("ALTextToSpeech")

    #Says a test std::string
    tts.say("This is a sample text!")


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--ip", type=str, default="127.0.0.1",
                        help="Robot IP address. On robot or Local Naoqi: use '127.0.0.1'.")
    parser.add_argument("--port", type=int, default=9559,
                        help="Naoqi port number")

    args = parser.parse_args()
    session = qi.Session()
    try:
        session.connect("tcp://" + args.ip + ":" + str(args.port))
    except RuntimeError:
        print ("Can't connect to Naoqi at ip \"" + args.ip + "\" on port " + str(args.port) +".\n"
               "Please check your script arguments. Run with -h option for help.")
        sys.exit(1)
    main(session)
void ALTextToSpeechProxy::say(const std::string& stringToSay, const std::string& language)

Says the specified string of characters in the specified language.

Parameters:
  • stringToSay – Text to say, encoded in UTF-8.
  • language – Language (English name).

altexttospeech_altexttospeech_say2.py

#! /usr/bin/env python
# -*- encoding: UTF-8 -*-

"""Example: Use say Method"""

import qi
import argparse
import sys


def main(session):
    """
    This example uses the say method to make the robot speak.
    If French is installed, it will use the French pronunciation for "voiture"
    Else, it will try to say it in English.
    """
    # Get the service ALTextToSpeech.

    tts = session.service("ALTextToSpeech")

    #Sets the language to English
    tts.setLanguage("English")

    tts.say("Let me teach you some French words.")
    tts.say("In French, we say")
    try :
        tts.say("voiture", "French")
    except RuntimeError:
        print "French language is not installed, please install it to have a French pronunciation."
        tts.say("voiture", "English")
    tts.say("for car")


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--ip", type=str, default="127.0.0.1",
                        help="Robot IP address. On robot or Local Naoqi: use '127.0.0.1'.")
    parser.add_argument("--port", type=int, default=9559,
                        help="Naoqi port number")

    args = parser.parse_args()
    session = qi.Session()
    try:
        session.connect("tcp://" + args.ip + ":" + str(args.port))
    except RuntimeError:
        print ("Can't connect to Naoqi at ip \"" + args.ip + "\" on port " + str(args.port) +".\n"
               "Please check your script arguments. Run with -h option for help.")
        sys.exit(1)
    main(session)
void ALTextToSpeechProxy::sayToFile(const std::string& stringToSay, const std::string& fileName)

Works similarly to ALTextToSpeechProxy::say but the synthesized signal is recorded into the specified file instead of being sent to the robot’s loudspeakers. The signal is encoded with a sample rate of 22050Hz (European languages) and 16000Hz (Asian languages), format S16_LE, 1 channel.

Parameters:
  • stringToSay – Text to be synthesized, encoded in UTF-8.
  • fileName – file where the synthesized signal should be recorded (can be either a .raw file or a .wav file).

altexttospeech_saytofile.py

#! /usr/bin/env python
# -*- encoding: UTF-8 -*-

"""Example: Use sayToFile Method"""

import qi
import argparse
import sys


def main(session):
    """
    This example uses the sayToFile method.
    It makes the robot say some text using the module,
    And write it in a file.
    """
    # Get the service ALTextToSpeech.

    tts = session.service("ALTextToSpeech")

    #Says a test std::string, and save it into a file
    tts.sayToFile("This is a sample text, written in a file!", "/tmp/sample_text.raw")

    #Says a test std::string, and save it into a file
    tts.sayToFile("This is another sample text", "/tmp/sample_text.wav")


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--ip", type=str, default="127.0.0.1",
                        help="Robot IP address. On robot or Local Naoqi: use '127.0.0.1'.")
    parser.add_argument("--port", type=int, default=9559,
                        help="Naoqi port number")

    args = parser.parse_args()
    session = qi.Session()
    try:
        session.connect("tcp://" + args.ip + ":" + str(args.port))
    except RuntimeError:
        print ("Can't connect to Naoqi at ip \"" + args.ip + "\" on port " + str(args.port) +".\n"
               "Please check your script arguments. Run with -h option for help.")
        sys.exit(1)
    main(session)
void ALTextToSpeechProxy::setLanguage(const std::string& language)

Sets the language currently used by the text to speech system. Each NAOqi restart will however reset that setting to the default language that can be set on the robot’s web page.

Parameters:
void ALTextToSpeechProxy::setLanguageDefaultVoice(const std::string& language, const std::string& voice)

Sets the voice to be used by default with a specified language.

Parameters:
  • language – the language among those available on your robot
  • voice – the voice among those available for this language on your robot
void ALTextToSpeechProxy::setParameter(const std::string& parameter, const float& value)

Sets parameters of the text to speech engine.

Parameters:
  • parameter – Name of the parameter
  • value – Value of the parameter

The available parameters are specific to the speech engine:

— All languages —

Parameters Description
pitchShift

applies a pitch shift to the voice. The value indicates the ratio between the new fundamental frequencies and the original one (examples: 2.0: an octave above, 1.5: a quint above).

Acceptable range is [1.0 - 4]. 0 disables the effect.
doubleVoice

adds a second voice to the first one. The value indicates the ratio between the second voice fundamental frequency and the first one.

Acceptable range is [1.0 - 4]. 0 disables the effect.
doubleVoiceLevel

sets the gain of the additional voice compared to the original one.

Acceptable range is [0 - 4]. 0 disables the effect.
doubleVoiceTimeShift

sets the delay (seconds) between the doubled voice and the original one.

Acceptable range is [0 - 0.5].
speed

sets the current voice speed. The default value is 100.

Acceptable range is [50 - 400].
defaultVoiceSpeed

sets the default speed of the voice. The speed will be set to this value when ALTextToSpeechProxy::resetSpeed is called. Setting this parameter also resets the speed.

Acceptable range is [50 - 400].

— Japanese only —

Parameters Description
enableCompression

Enables the audio dynamic compression on the speech. This will increase the global volume of the voice.

0 activate the audio dynamic compression 1 deactivate the audio dynamic compression
Parameters Acceptable range
volume [0.00001 - 2.0]
pitch [0.5 - 2.0]
emph [0.0 - 2.0]
pauseMiddle [80.0 and 300.0]
pauseLong [300.0 - 2000.0]
pauseSentence [80.0 and 10000.0]

altexttospeech_setparameter.py

#! /usr/bin/env python
# -*- encoding: UTF-8 -*-

"""Example: Use setParameter Method"""

import qi
import argparse
import sys


def main(session):
    """
    This example uses the setParameter method.
    It sets the pitchShift to use in the module.
    """
    # Get the service ALTextToSpeech.

    tts = session.service("ALTextToSpeech")

    #Applies a pitch shifting to the voice
    tts.setParameter("pitchShift", 1.5)
    #Deactivates double voice
    tts.setParameter("doubleVoice", 0.0)

    tts.say("Pitch shift and double voice changed")


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--ip", type=str, default="127.0.0.1",
                        help="Robot IP address. On robot or Local Naoqi: use '127.0.0.1'.")
    parser.add_argument("--port", type=int, default=9559,
                        help="Naoqi port number")

    args = parser.parse_args()
    session = qi.Session()
    try:
        session.connect("tcp://" + args.ip + ":" + str(args.port))
    except RuntimeError:
        print ("Can't connect to Naoqi at ip \"" + args.ip + "\" on port " + str(args.port) +".\n"
               "Please check your script arguments. Run with -h option for help.")
        sys.exit(1)
    main(session)
void ALTextToSpeechProxy::setVoice(const std::string& voiceID)

Changes the voice used by the text-to-speech engine. The voice identifier must belong to the installed voices, that can be listed using the ALTextToSpeechProxy::getAvailableVoices method.

Parameters:
  • voiceID – Name of the voice

altexttospeech_setvoice.py

#! /usr/bin/env python
# -*- encoding: UTF-8 -*-

"""Example: Use setVoice Method"""

import qi
import argparse
import sys


def main(session):
    """
    This example uses the setVoice method.
    It sets the voice to use in the module.
    """
    # Get the service ALTextToSpeech.

    tts = session.service("ALTextToSpeech")

    #Changes the basic voice of the synthesis
    tts.setVoice("naoenu")

    tts.say("Voice changed to naoenu")


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--ip", type=str, default="127.0.0.1",
                        help="Robot IP address. On robot or Local Naoqi: use '127.0.0.1'.")
    parser.add_argument("--port", type=int, default=9559,
                        help="Naoqi port number")

    args = parser.parse_args()
    session = qi.Session()
    try:
        session.connect("tcp://" + args.ip + ":" + str(args.port))
    except RuntimeError:
        print ("Can't connect to Naoqi at ip \"" + args.ip + "\" on port " + str(args.port) +".\n"
               "Please check your script arguments. Run with -h option for help.")
        sys.exit(1)
    main(session)
void ALTextToSpeechProxy::setVolume(const float& volume)

Sets the current gain applied to the signal synthesized by the text to speech engine. The default value is 1.0.

Parameters:
  • volume – Gain

altexttospeech_setvolume.py

#! /usr/bin/env python
# -*- encoding: UTF-8 -*-

"""Example: Use setVolume Method"""

import qi
import argparse
import sys


def main(session):
    """
    This example uses the setVolume method.
    It sets the volume to use in the module.
    """
    # Get the service ALTextToSpeech.

    tts = session.service("ALTextToSpeech")

    #Changes the volume
    tts.setVolume(0.5)
    tts.say("Volume set to 50%")


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--ip", type=str, default="127.0.0.1",
                        help="Robot IP address. On robot or Local Naoqi: use '127.0.0.1'.")
    parser.add_argument("--port", type=int, default=9559,
                        help="Naoqi port number")

    args = parser.parse_args()
    session = qi.Session()
    try:
        session.connect("tcp://" + args.ip + ":" + str(args.port))
    except RuntimeError:
        print ("Can't connect to Naoqi at ip \"" + args.ip + "\" on port " + str(args.port) +".\n"
               "Please check your script arguments. Run with -h option for help.")
        sys.exit(1)
    main(session)
void ALTextToSpeechProxy::showDictionary()

Nuance and Japanese only.

Shows the user dictionary of the current language in the logs of naoqi if there is one available.

void ALTextToSpeechProxy::stopAll()

This method stops the current and all the pending tasks immediately.

Events

Event: "ALTextToSpeech/CurrentBookMark"
callback(std::string eventName, int value, std::string subscriberIdentifier)

Indicates the occurrence of the bookmarks that are placed (using “mrk=number” number being an integer [0 - 65535]) in the string that needs to be synthesized.

For further information, see Acapela Mobility Text TAGS.

Parameters:
  • eventName (std::string) – “ALTextToSpeech/CurrentBookMark”
  • value – Current bookmark.
  • subscriberIdentifier (std::string) –
Event: "ALTextToSpeech/CurrentSentence"
callback(std::string eventName, std::string value, std::string subscriberIdentifier)

Indicates the sentence that is currently synthesized.

Parameters:
  • eventName (std::string) – “ALTextToSpeech/CurrentSentence”
  • value – Current sentence.
  • subscriberIdentifier (std::string) –
Event: "ALTextToSpeech/CurrentWord"
callback(std::string eventName, std::string value, std::string subscriberIdentifier)

Indicates the word that is currently synthesized.

no-virtual Not relevant on a simulated robot.

Warning

Not available for Japanese engine.

Parameters:
  • eventName (std::string) – “ALTextToSpeech/CurrentWord”
  • value – Current word.
  • subscriberIdentifier (std::string) –
Event: "ALTextToSpeech/PositionOfCurrentWord"
callback(std::string eventName, int value, std::string subscriberIdentifier)

Indicates the word that is currently synthesized by its index in the current sentence. Index 0 refers to the first word of the sentence.

Warning

Not available for Japanese engine.

Parameters:
  • eventName (std::string) – “ALTextToSpeech/PositionOfCurrentWord”
  • value – Current word position.
  • subscriberIdentifier (std::string) –
Event: "ALTextToSpeech/Status"
callback(std::string eventName, AL::ALValue value, std::string subscriberIdentifier)

Raised when the status of a task changes.

Parameters:
  • eventName (std::string) – “ALTextToSpeech/Status”
  • value –

    [idOfConcernedTask, status]

    Where:

    • idOfConcernedTask is the ID of the task concerned by the event.
    • status can be “enqueued”, “started”, “thrown”, “stopped” or “done”.
  • subscriberIdentifier (std::string) –
Event: "ALTextToSpeech/TextStarted"
callback(std::string eventName, bool value, std::string subscriberIdentifier)

Raised when the current sentence synthesis starts.

Parameters:
  • eventName (std::string) – “ALTextToSpeech/TextStarted”
  • value – True if the current speaking task is in progress.
  • subscriberIdentifier (std::string) –
Event: "ALTextToSpeech/TextDone"
callback(std::string eventName, bool value, std::string subscriberIdentifier)

Raised when the current sentence synthesis is done.

Parameters:
  • eventName (std::string) – “ALTextToSpeech/TextDone”
  • value – True if the current speaking task is done.
  • subscriberIdentifier (std::string) –
Event: "ALTextToSpeech/TextInterrupted"
callback(std::string eventName, bool value, std::string subscriberIdentifier)

Raised when the current sentence synthesis is interrupted, for example by ALTextToSpeechProxy::stopAll.

Parameters:
  • eventName (std::string) – “ALTextToSpeech/TextInterrupted”
  • value – True if the current speaking task is interrupted.
  • subscriberIdentifier (std::string) –

Signals

qi::Signal<qi::os::timeval> ALTextToSpeech::synchroTTS

During a dialog session, the robot switches between speaking phase and listening phase. This signal is raised only at the end of the last sentence of the speaking phase to indicate the beginning of the listening phase. Time value contains the remaining sound to be played before the actual end of the speech.

qi::Signal<std::string> ALTextToSpeech::languageTTS

Raised each time the language used by the text to speech engine is successfully changed. The string contains the locale code corresponding to the language set. To see the correspondance between this code and its language please check Available languages or |pepp| Supported languages.