Python Tutorial

Introduction Python Features Python Applications System requirements for Python Python Installation Python Basics Python Variables Python Data Types Python IDE Python Keywords Python Operators Python Comments Python Pass Statement

Python Conditional Statements

Python if Statement Python elif Statement Python If-else statement Python Switch Case

Python Loops

Python for loop Python while loop Python Break Statement Python Continue Statement Python Goto Statement

Python Arrays

Python Array Python Matrix

Python Strings

Python Strings Python Regex

Python Built-in Data Structure

Python Lists Python Tuples Python Lists vs Tuples Python Dictionary Python Sets

Python Functions

Python Function Python min() function Python max() function Python User-define Functions Python Built-in Functions Anonymous/Lambda Function in Python

Python File Handling

Python File Handling Python Read CSV Python Write CSV Python Read Excel Python Write Excel Python Read Text File Python Write Text File Read JSON File in Python

Python Exception Handling

Python Exception Handling Python Errors and exceptions Python Assert

Python OOPs Concept

OOPs Concepts in Python Classes & Objects in Python Inheritance in Python Polymorphism in Python Python Encapsulation Python Constructor Static Variables in Python Abstraction in Python

Python Iterators

Iterators in Python Yield Statement In Python

Python Generators

Python Generator

Python Decorators

Python Decorator

Python Functions and Methods

Python Built-in Functions Python String Methods Python List Methods Python Dictionary Methods Python Tuple Methods Python Set Methods

Python Modules

Python Modules Python Datetime Module Python Calendar Module  

Python MySQL

Python MySQL Python MySQL Update Operation Python MySQL Delete Operation

Python MongoDB

Python MongoDB

Python Data Structure Implementation

Python Stack Python Queue Python Hash Table Python Graph

Python Advance Topics

Speech Recognition in Python Face Recognition in Python Python Rest API Python Command Line Arguments Python JSON Python Virtual Environment Type Casting in Python Collections in python Python Enumerate Python Debugger Python DefaultDict

Misc

Python PPTX Python Pickle Python Seaborn Python Coroutine Python EOL Python Infinity Python math.cos and math.acos function Python Project Ideas Based On Django Reverse a String in Python Reverse a Number in Python Python Word Tokenizer Python Trigonometric Functions Python try catch exception GUI Calculator in Python Implementing geometric shapes into the game in python Installing Packages in Python Python Try Except Python Sending Email Socket Programming in Python Python CGI Programming Python Data Structures Python abstract class Python Compiler Python K-Means Clustering List Comprehension in Python3 NSE Tools In Python Operator Module In Python Palindrome In Python Permutations in Python Pillow Python introduction and setup Python Functionalities of Pillow Module Python Argmin Python whois Python JSON Schema Python lock Return Statement In Python Reverse a sentence In Python tell() function in Python Why learn Python? Write Dictionary to CSV in Python Write a String in Python Binary Search Visualization using Pygame in Python Latest Project Ideas using Python 2022 Closest Pair of Points in Python ComboBox in Python Python vs R Python Ternary Operators Self in Python Python vs Java Python Modulo Python Packages Python Syntax Python Uses Python Logical Operators Python Multiprocessing Python History Difference between Input() and raw_input() functions in Python Conditional Statements in python Confusion Matrix Visualization Python Python Algorithms Python Modules List Difference between Python 2 and Python 3 Is Python Case Sensitive Method Overloading in Python Python Arithmetic Operators Design patterns in python Assignment Operators in Python Is Python Object Oriented Programming language Division in Python Python exit commands Continue And Pass Statements In Python Colors In Python Convert String Into Int In Python Convert String To Binary In Python Convert Uppercase To Lowercase In Python Convert XML To JSON In Python Converting Set To List In Python Covariance In Python CSV Module In Python Decision Tree In Python Difference Between Yield And Return In Python Dynamic Typing In Python Abstract design pattern in python Builder design pattern in python Prototype design pattern in Python Creational design patterns in Python

How to

How to convert integer to float in Python How to reverse a string in Python How to take input in Python How to install Python in Windows How to install Python in Ubuntu How to install PIP in Python How to call a function in Python How to download Python How to comment multiple lines in Python How to create a file in Python How to create a list in Python How to declare array in Python How to clear screen in Python How to convert string to list in Python How to take multiple inputs in Python How to write a program in Python How to compare two strings in Python How to create a dictionary in Python How to create an array in Python How to update Python How to compare two lists in Python How to concatenate two strings in Python How to print pattern in Python How to check data type in python How to slice a list in python How to implement classifiers in Python How To Print Colored Text in Python How to develop a game in python How to print in same line in python How to create a class in python How to find square root in python How to import numy in python How to import pandas in python How to uninstall python How to upgrade PIP in python How to append a string in python How to open a file in python

Sorting

Python Sort List Sort Dictionary in Python Python sort() function Python Bubble Sort

Programs

Factorial Program in Python Prime Number Program in Python Fibonacci Series Program in Python Leap Year Program in Python Palindrome Program in Python Check Palindrome In Python Calculator Program in Python Armstrong Number Program in Python Python Program to add two numbers Anagram Program in Python Even Odd Program in Python GCD Program in Python Python Exit Program Python Program to check Leap Year Operator Overloading in Python Pointers in Python Python Not Equal Operator Raise Exception in Python Salary of Python Developers in India What is a Script in Python Singleton design pattern in python

Speech Recognition Module in Python

Speech Module in Python: Converting text to speech, known as Speech Synthesis, this process is the computer-generated recreation of human speech. This module converts the human language text into human-like speech audio. 

In this article, we will discuss how to convert text to speech in Python language. We will not be developing any neutral networks nor training the model to achieve any results. Instead, we will use some APIs and engines that offer the facility to convert text into speech in Python. There are many APIs that have this quality, and among them, one of the most used services is Google text to Speech, an online library. In contrast, another library we will discuss is pyttsx3, which is an offline library of Python.

To get started with Python online library, that is gTTS (Google Text To Speech) library, by installing it using PIP:

 pip3 install gTTS              # Google text to speech library
 pip3 install playsound 

Online Text to Speech Module

The gTTS is the python library used for interfacing with Google translate’s text to speech API. This library only works with an internet connection, and this is very easy and simple to use.

Open the new Python file and Import:

 import gtts             # Google text to speech library
 from playsound import playsound 

We need to pass the text to the gTTS (Google text to speech library) module to use this library. What is the interface to Google translate's text to speech API:

For Example:

 # First, we have made the request to google to get synthesis
 textts = gtts.gTTS ( " Hello Programmers " ) 

Till now, we have sent the text and recovered the original speech from the API (Application Programming Interface), Now we will save this audio to the file:

 # we are saving the audio into a file
 textts.save( " JTP.mp3 " ) 

Now, we can notice that a new file has visible in the current directory. We can play it by using the playsound module, which we have installed earlier.

 # we will play the audio file
 playsound ( " JTP.mp3 " ) 

And now, we can hear a robot speaking what we just asked it to say. We can use it for other languages also, by passing the lang parameter:

 # for example, in spanish
 textts = gtts.gTTS ( " Hola Española " , lang = " es " )
 textts.save ( " spanish.mp3 " )
 playsound ( " spanish.mp3 " ) 

If the user does not want to save the audio in the file and wants to play it directly, they can use textts.write_to_fp(), which will accept io.BytesIO() object to write into it.

User can see the available languages by using this:

 # to see all available languages along with their IETF tag
 Print ( gtts.lang.tts_langs ( ) ) 

Here are the supported languages:

Output:

{ ' af ' : ' Afrikaans ' , ' sq ' : ' Albanian ' , ' ar ' : ' Arabic ' , ' hy ' : ' Armenian ' , ' bn ' : ' Bengali ' , ' bs ' : ' Bosnian ' , ' ca ' : ' Catalan ' , ' hr ' : ' Croatian ' , ' cs ' : ' Czech ' ,  ' da ' : ' Danish ' , ' nl ' : ' Dutch ' , ' en ' : ' English ' , ' eo ' : ' Esperanto ' , ' et ' : ' Estonian ' , ' tl ' : ' Filipino ' , ' fi ' : ' Finnish ' , ' fr ' : ' French ' , ' de ' : ' German ' , ' el ' : ' Greek ' , ' gu ' : ' Gujarati ' , ' hi ' : ' Hindi ' , ' hu ' : ' Hungarian ' , ' is ' : ' Icelandic ' , ' id ' : ' Indonesian ' , ' it ' : ' Italian ' , ' ja ' : ' Japanese ' , ' jw ' : ' Javanese ' , ' kn ' : ' Kannada ' , ' km ' :  ' Khmer ' , ' ko ' : ' Korean ' , ' la ' : ' Latin ' , ' lv ' : ' Latvian ' , ' mk ' : ' Macedonian ' , ' ml ' : ' Malayalam ' , ' mr ' : ' Marathi ' , ' my ' : ' Myanmar ( Burmese ) ' , ' ne ' : ' Nepali ' , ' no ' : ' Norwegian ' , ' pl ' : ' Polish ' , ' pt ' : ' Portuguese ' , ' ro ' : ' Romanian ' , ' ru ' : ' Russian ' , ' sr ' : ' Serbian ' , ' si ' : ' Sinhala ' , ' sk ' :  ' Slovak ' , ' es ' : ' Spanish ' , ' su ' : ' Sundanese ' , ' sw ' : ' Swahili ' , ' sv ' : ' Swedish ' , ' ta ' : ' Tamil ' , ' te ' : ' Telugu ' , ' th ' : ' Thai ' , ' tr ' : ' Turkish ', ' uk ' : ' Ukrainian ' , ' ur ' : ' Urdu ' , ' vi ' : ' Vietnamese ' , ' cy ' : ' Welsh ' , ' zh-cn ' : ' Chinese ( Mandarin / China ) ' , ' zh -tw ' : ' Chinese ( Mandarin / Taiwan ) ' , ' en – us ' : ' English ( US ) ' , ' en - ca ' : ' English ( Canada ) ' , ' en -uk ' :  ' English ( UK ) ' , ' en -gb ' : ' English ( UK ) ' , ' en -au ' : ' English ( Australia ) ' , ' en -gh ' : ' English ( Ghana ) ', ' en -in ' : ' English ( India ) ' , ' en -ie ' : ' English ( Ireland ) ' , ' en -nz ' : ' English ( New Zealand ) ' , ' en -ng ' : ' English ( Nigeria ) ' , ' en -ph ' : ' English ( Philippines ) ' , ' en- za ' : ' English ( South Africa ) ' , ' en -tz ' : ' English ( Tanzania ) ' , ' fr -ca ' : ' French ( Canada ) ' , ' fr -fr ' : ' French ( France ) ' , ' pt -br ' :  ' Portuguese ( Brazil ) ' , ' pt -pt ' : ' Portuguese ( Portugal ) ' , ' es -es ' : ' Spanish ( Spain ) ' , ' es -us ' : ' Spanish ( United States ) ' }

Offline Text to Speech

We know how to use Google Text To Speech API, but what if we want to convert the text to speech without an internet connection. Well, the pyttsx3 library is used for that purpose. This is a library of python which is used for converting text to speech. This library looks for a TTS engine, which is pre-install in the out platform and uses them for conversion.

The following are the text-to-speech synthesizers that the pyttsx3 library uses:

  • SAPI5 on Windows XP, Windows Vista, 8, 8.1 and 10
  • espeak on Ubuntu Desktop Edition 8.10, 9.04 and 9.10
  • NSSpeechSynthesizer on Mac OS X 10.5 and 10.6

The main features of the pyttsx3 library are:

  • This library works totally offline.
  • User can choose between various voices that are installed on their system.
  • This library can control the speed of speech
  • It can tweak the volume
  • It can save the speech audio into the file

If the user is using this library on a Linux operating system and their voice output is not working with the pyttsx3 library, then they have to install espeak, ffmpeg, and libespeak1.

 $ sudo apt update && sudo apt install espeak
 install ffmpeg
 install libespeak1 

To start using this library, we have to open the new python file and import the library in it:

 # importing the text to speech library of python
 import pyttsx3 

Now, we have to initialize the text-to-speech engine of the system:

 # we are initializing the Text-to-speech engine of the system
 engine_system = pyttsx3.init () 

For converting the text, we have to use say() and runAndWait() methods:

 # for converting the following text to speech
 text_speech = " Python is a simple and most popular programming language "
 engine_system.say ( text_speech )
 # to play the speech
 engine_system.runAndWait () 

The say() function adds the sound to the speak at the event queue, whereas, runAndWait() function runs the real event loop while waiting for all the commands to queue up.

So, we can call the say() function numerous times and then run the runAndWait() function in a single command in the end in order to hear the synthesis.

This library has some properties that the user can tweak depending on their requirements.

For example:

Let’s see the details of the speaking rate:

 # let’s see the details of the speaking rate
 rate = engine_system.getProperty ( "rate" )
 print ( rate ) 

Output:

200

Now, let’s change the speaking rate to 300, which will make the rate much faster.

 # to set the new voice rate to make it faster
 engine_system.setProperty ( "rate" , 300 )
 engine_system.say ( text )
 engine_system.runAndWait () 

we can also set it to 100, which will make it slower:

 # to set the speaking rate to make it slower
 engine_system.setProperty ( "rate" , 100 )
 engine_system.say ( text_speech )
 engine_system.runAndWait ( ) 

Another useful functionality of this library is voices, by which the user can see the details about all the voices available on their system.

 # to see the details of all voices available on the system
 voices = engine_system.getProperty ( "voices" )
 print ( voices ) 

Output:

[ < pyttsx3.voice.Voice object at 0x000001994D817A20 > , < pyttsx3.voice.Voice object at 0x000001994D817F898 > , < pyttsx3.voice.Voice object at 0x000001994D6182D30 > , < pyttsx3.voice.Voice object at 0x000001994E799C10 > , < pyttsx3.voice.Voice object at 0x000001994D48CD90 > ]

As we can see here, that my system has five voice sounds, lets use the fifth one.

For example:

 # to set the voice another voice
 engine_system.setProperty ( "voice" , voices [ 5 ].id )
 engine_system.say ( text_speech )
 engine_system.runAndWait ( ) 

We can save the audio as the file by using the save_to_file() function if we don’t want to play the audio by using the say() function.

For example:

 # for saving the speech audio into the file
 engine_system.save_to_file ( text , "text_to_Speech.mp3" )
 engine_system.runAndWait ( ) 

Example for listening the event:

 import pyttsx3
 def onStart ( ):
    print ( ' starting ' )
 def onWord ( name , location , length ) :
    print ( ' word ' , name , location , length )
 def onEnd ( name , completed ) :
    print ( ' finishing ' , name , completed )
 engine = pyttsx3.init ( )
 engine.connect ( ' started-utterance ' , onStart )
 engine.connect ( ' started-word ' , onWord )
 engine.connect ( ' finished-utterance ' , onEnd )
 sen = ' One day the people that don’t even believe in you will tell everyone how they met you '
 engine.say ( sen )
 engine.runAndWait ( ) 

Output:

 word None 1 559936
 word None 1 559936
 word None 1 559936
 finishing None True
 finishing None True
 finishing None True 

Conclusion:

In this article, we have discussed two types of python libraries, gTTS and pyttsx3, used for converting text into speech, one for Online conversion and another one is for offline conversion. We have also discussed their various properties of how a user can change the speaking rate of the speech and how they can change the voice into different voices available on their system. 



ADVERTISEMENT
ADVERTISEMENT