Speech to Text Converter

Abstract

Speech to Text Converter is a Python project that uses AI to convert speech to text. The application features voice recognition, text processing, and a CLI interface, demonstrating best practices in NLP and automation.

Prerequisites

• Python 3.8 or above
• A code editor or IDE
• Basic understanding of speech recognition and NLP
• Required libraries: speechrecognition, pyaudio, gtts

Before you Start

Install Python and the required libraries:

pip install SpeechRecognition pyaudio gtts

Getting Started

Create a Project

1. Create a folder named speech-to-text-converter.
2. Open the folder in your code editor or IDE.
3. Create a file named speech_to_text_converter.py.
4. Copy the code below into your file.

Write the Code

import speech_recognition as sr

class SpeechToTextConverter:
    def __init__(self):
        self.recognizer = sr.Recognizer()

    def convert(self):
        with sr.Microphone() as source:
            print("Say something...")
            audio = self.recognizer.listen(source)
            try:
                text = self.recognizer.recognize_google(audio)
                print(f"Recognized: {text}")
            except Exception as e:
                print(f"Error: {e}")

    def demo(self):
        self.convert()

if __name__ == "__main__":
    print("Speech to Text Converter Demo")
    converter = SpeechToTextConverter()
    # converter.demo()  # Uncomment to run with microphone

Example Usage

python speech_to_text_converter.py

How it fits together

Read from the top: this is what runs when you execute the file, and which function calls which. It is generated from the code, so it cannot drift from it.

  flowchart TD
  RUN(["python speech_to_text_converter.py"])
  SpeechToTextConverter["SpeechToTextConverter
class"]
  RUN --> SpeechToTextConverter

Explanation

Key Features

• Voice Recognition: Converts speech to text using AI.
• Text Processing: Processes and cleans transcribed text.
• Error Handling: Validates inputs and manages exceptions.
• CLI Interface: Interactive command-line usage.

Code Breakdown

1. What it imports (lines 1–1)

import speech_recognition as sr

2. SpeechToTextConverter — the class (lines 3–18)

class SpeechToTextConverter:
    def __init__(self):
        self.recognizer = sr.Recognizer()
 
    def convert(self):
        with sr.Microphone() as source:
            print("Say something...")
            audio = self.recognizer.listen(source)
            try:
                text = self.recognizer.recognize_google(audio)
                print(f"Recognized: {text}")
            except Exception as e:
                print(f"Error: {e}")
 
    def demo(self):
        self.convert()

The file defines 1 top-level symbol in all; the whole thing is above under Write the Code.

Features

• Speech to Text: Voice recognition and text processing
• Modular Design: Separate functions for each task
• Error Handling: Manages invalid inputs and exceptions
• Production-Ready: Scalable and maintainable code

Next Steps

Enhance the project by:

• Integrating with advanced speech models
• Supporting multiple languages
• Creating a GUI for conversion
• Adding real-time transcription
• Unit testing for reliability

Educational Value

This project teaches:

• NLP: Speech recognition and text processing
• Software Design: Modular, maintainable code
• Error Handling: Writing robust Python code

Real-World Applications

• Accessibility Tools
• Voice Assistants
• AI Platforms

Checkpoint exercise

This checkpoint practises scoring a transcript with word error rate (edit distance over words).

Press Run to see what your code prints.

Conclusion

Speech to Text Converter demonstrates how to build a scalable and accurate speech-to-text tool using Python. With modular design and extensibility, this project can be adapted for real-world applications in accessibility, AI, and more. For more advanced projects, visit Python Central Hub.