import numpy as np

def text_to_sequence(text):
    # Convert text to a sequence of integers
    pass

def sequence_to_text(sequence):
    # Convert a sequence of integers back to text
    pass

def normalize_audio(audio):
    # Normalize audio signal
    pass

def denormalize_audio(audio):
    # Denormalize audio signal
    pass

def save_audio(audio, file_path):
    # Save audio to file
    pass

def load_audio(file_path):
    # Load audio from file
    pass