Speech tools - espeak and festival etc.

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 Using speech tools in Kali Linux involves installing and utilizing various software packages designed for speech processing, synthesis, and recognition. Here are the steps to get you started:

1. Install Required Packages

Kali Linux is based on Debian, so you can use apt to install the necessary packages. Some popular speech tools include espeak, festival, and pocketsphinx.

Install espeak

espeak is a compact open-source software speech synthesizer for English and other languages.

sudo apt update

sudo apt install espeak


You can test espeak by running:

espeak "Hello, this is a test of the espeak system."

Install festival

festival is a general-purpose, multi-lingual speech synthesis system.

sudo apt install festival


You can test festival by running:

echo "Hello, this is a test of the festival system." | festival --tts

Install pocketsphinx

pocketsphinx is a lightweight speech recognition engine from CMU Sphinx.
sudo apt install pocketsphinx pocketsphinx-en-us

You can test pocketsphinx by running:

 pocketsphinx_continuous -inmic yes


2. Configuration and Usage

After installing the necessary tools, you may need to configure them for your specific use cases.

Using espeak

You can change the voice, speed, and pitch of the speech with options. For example:

sh
espeak -v en-us -s 150 -p 50 "Hello, this is a customized espeak test."
  • -v: Voice (language and accent)
  • -s: Speed (words per minute)
  • -p: Pitch

Using festival

festival can be used interactively or in batch mode. For batch mode, you can create a text file and feed it to festival:

sh
echo "Hello, this is a test." > test.txt
festival --tts test.txt

Using pocketsphinx

pocketsphinx is primarily used for speech recognition. For better accuracy, you can use acoustic and language models specific to your use case. Start recognition from the microphone:

sh

pocketsphinx_continuous -inmic yes

3. Advanced Usage

For more advanced uses, such as integrating speech recognition with other applications, you might want to write scripts or programs.

Example Python Script with speech_recognition

You can use the speech_recognition library in Python to utilize pocketsphinx.

First, install the library:

sh

sudo apt install python3-pip
pip3 install SpeechRecognition

Then, you can use the following Python script:

python
import speech_recognition as sr

# Obtain audio from the microphone
recognizer = sr.Recognizer()
with sr.Microphone() as source:
    print("Say something!")
    audio = recognizer.listen(source)

# Recognize speech using Sphinx
try:
    print("Sphinx thinks you said: " + recognizer.recognize_sphinx(audio))
except sr.UnknownValueError:
    print("Sphinx could not understand audio")
except sr.RequestError as e:
    print("Sphinx error; {0}".format(e))

Save the script to a file, for example recognize.py, and run it:

sh
python3 recognize.py


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