Text-to-speech generation in Prompt Engineering / GenAI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the text-to-speech library.

Prompt Engineering / GenAI

import [1]

Drag options to blanks, or click blank then click option'

Apandas

Bnumpy

Cgtts

Dmatplotlib

Attempts:

3 left

💡 Hint

Common Mistakes

Importing unrelated libraries like numpy or pandas.

Misspelling the library name.

The gtts library is used for text-to-speech generation in Python.

2fill in blank

medium

Complete the code to create a text-to-speech object from a string.

Prompt Engineering / GenAI

tts = gtts.gTTS(text=[1])

Drag options to blanks, or click blank then click option'

ATrue

B'Hello, world!'

C12345

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Passing numbers or boolean values instead of a string.

Forgetting to put quotes around the text.

The text parameter must be a string containing the text to convert to speech.

3fill in blank

hard

Fix the error in saving the speech audio to a file.

Prompt Engineering / GenAI

tts.[1]('output.mp3')

Drag options to blanks, or click blank then click option'

Aexport

Bwrite

Crecord

Dsave

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect method names like write or export.

Forgetting parentheses after the method name.

The correct method to save the audio file in gtts is 'save'.

4fill in blank

hard

Fill both blanks to play the saved audio file using Python.

Prompt Engineering / GenAI

import [1]
[2].playsound('output.mp3')

Drag options to blanks, or click blank then click option'

Aplaysound

Bos

Csys

Dpygame

Attempts:

3 left

💡 Hint

Common Mistakes

Importing unrelated modules like os or sys.

Using pygame without proper initialization.

The playsound module is used to play audio files simply in Python.

5fill in blank

hard

Fill all three blanks to create a dictionary of language codes and descriptions for TTS.

Prompt Engineering / GenAI

languages = {
    'en': [1],
    'es': [2],
    'fr': [3]
}

Drag options to blanks, or click blank then click option'

A'English'

B'Spanish'

C'French'

D'German'

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up language codes and names.

Using unsupported language names.

The dictionary maps language codes to their language names for TTS selection.

Practice

1. What is the main purpose of text-to-speech (TTS) technology?

easy

A. To summarize long documents automatically

B. To translate text from one language to another

C. To detect emotions in spoken language

D. To convert written text into spoken audio

Solution

1. Step 1: Understand the function of TTS

   Text-to-speech technology changes written words into sound that can be heard.

2. Step 2: Compare options with TTS purpose

   Only To convert written text into spoken audio describes converting text to speech, which matches TTS.

3. Final Answer:

   To convert written text into spoken audio -> Option D

4. Quick Check:

   TTS = convert text to speech [OK]

Hint: Remember TTS means text becomes speech [OK]

Common Mistakes:

• Confusing TTS with translation
• Thinking TTS summarizes text
• Mixing TTS with emotion detection

2. Which Python library is commonly used for simple text-to-speech conversion?

easy

A. Pandas

B. gTTS

C. Matplotlib

D. NumPy

Solution

1. Step 1: Identify libraries related to TTS

   gTTS is a Python library designed for text-to-speech conversion.

2. Step 2: Eliminate unrelated libraries

   NumPy, Matplotlib, and Pandas are for math, plotting, and data, not TTS.

3. Final Answer:

   gTTS -> Option B

4. Quick Check:

   gTTS = text-to-speech library [OK]

Hint: gTTS stands for Google Text-to-Speech [OK]

Common Mistakes:

• Choosing data or plotting libraries by mistake
• Confusing gTTS with general Python packages
• Assuming TTS needs complex libraries always

3. What will the following Python code output?

from gtts import gTTS
text = 'Hello world'
tts = gTTS(text)
tts.save('hello.mp3')
print('Audio saved')

medium

A. An audio file named 'hello.mp3' is created and 'Audio saved' is printed

B. The text 'Hello world' is printed on screen

C. A syntax error occurs due to missing language parameter

D. Nothing happens because gTTS requires internet connection

Solution

1. Step 1: Analyze the code steps

   The code imports gTTS, creates speech from 'Hello world', saves it as 'hello.mp3', then prints a message.

2. Step 2: Check for errors or missing parts

   gTTS defaults to English if no language is given, so no syntax error occurs. Internet is needed but code runs assuming connection.

3. Final Answer:

   An audio file named 'hello.mp3' is created and 'Audio saved' is printed -> Option A

4. Quick Check:

   Code saves audio and prints message [OK]

Hint: gTTS saves audio file and prints confirmation [OK]

Common Mistakes:

• Thinking language parameter is mandatory
• Assuming print outputs the text spoken
• Ignoring that gTTS needs internet but code runs

4. Identify the error in this text-to-speech code snippet:

from gtts import gTTS
tts = gTTS('Hello')
tts.save()

medium

A. Missing filename argument in save() method

B. gTTS requires language parameter in constructor

C. Text argument should be a list, not a string

D. gTTS cannot be imported directly

Solution

1. Step 1: Check gTTS usage

   gTTS constructor accepts text string; language is optional. So no error there.

2. Step 2: Check save() method

   save() requires a filename string argument to save the audio file. Missing argument causes error.

3. Final Answer:

   Missing filename argument in save() method -> Option A

4. Quick Check:

   save() needs filename [OK]

Hint: save() always needs a filename string [OK]

Common Mistakes:

• Assuming language is always required
• Thinking text must be a list
• Believing import statement is wrong

5. You want to create a text-to-speech system that can speak multiple languages based on user input. Which approach is best?

hard

A. Use gTTS without language parameter and rely on default English

B. Manually translate text first, then use gTTS with fixed language

C. Use gTTS with a dynamic language parameter set from user input

D. Use a single pre-recorded audio file for all languages

Solution

1. Step 1: Understand multilingual TTS needs

   The system must speak different languages based on user choice, so language must be flexible.

2. Step 2: Evaluate options for language flexibility

   Use gTTS with a dynamic language parameter set from user input sets language dynamically in gTTS, allowing correct speech for each language. Others fix language or use static audio, which won't adapt.

3. Final Answer:

   Use gTTS with a dynamic language parameter set from user input -> Option C

4. Quick Check:

   Dynamic language parameter enables multilingual TTS [OK]

Hint: Set language parameter dynamically for multilingual speech [OK]

Common Mistakes:

• Ignoring language parameter flexibility
• Assuming default English works for all
• Using static audio files for dynamic text