1 - Introduction to FM synthesis
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⣀⣀⣀ ⠀⠀⠀⠀⠀⠀⠀⠀⣀⣠⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣴⣶⣶⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⣾⣿⣷⡄⠀⠀⠀⠀ ⢘⠛⣿⢛⡆ ⠀⠀⠀⠀⠀⠀⠀⢸⡛⣿⣛⡃⠀⠀⠀⠀⠀⠀⠀⠀⣦⣽⣧⡴⠀⠴⣿⣿⢶⠀⠀⠀⠀⠀⠀⠀⠀⠰⣶⣿⣶⠃⣀⣤⣄⡀⠈⢿⣿⡟⠁ ⠀⠀⠀⠀⠀⠀⠀⠈⠻⣿⡿⠁⠀⠀⠀⠀⠀⠀⠀⠀⢈⣻⣟⡁⠀⢲⣶⣷⡾⠀⠀⠀⠀⠀⠀⠀⠀⢀⣨⣿⣅⡀⣛⣻⣛⡃⣠⣶⣿⣶⣄ ⠀⠀⠀⠀⠀⠀⠀⣠⣶⣿⣶⣦⠀⠀⠀⠀⠀⠀⠀⣰⣿⣿⣿⣿⡄⣀⣹⣯⣀⠀⠀⠀⠀⠀⠀⠀⢀⡿⣿⣿⣿⢷⠹⣿⡿⢡⡟⣿⣿⣿⢻⡄ ⠀⠀⠀⠀⠀⠀⢠⡟⣿⣿⣿⢹⡆⠀⠀⠀⠀⠀⠀⡿⢸⣿⣿⡇⣿⢿⣿⣿⡿⣇⠀⠀⠀⠀⠀⠀⢸⡇⣿⣿⣿⢸⣷⣿⣷⣾⢃⣿⣿⣿⠸⡇ ⠀⠀⠀⠀⠀⠀⢸⠇⣿⡿⣿⡘⡇⠀⠀⠀⠀⠀⠀⡇⣾⠟⢻⡇⣿⢸⣿⣿⡇⢻⠀⠀⠀⠀⠀⠀⢸⢰⡿⠉⣿⣿⣿⣿⣿⣹⣾⡏⠀⣿⡠⡇ ⠀⠀⠀⠀⠀⠀⢸⠤⡿⠀⢹⡧⣇⠀⠀⠀⠀⠀⠰⡃⣿⠀⠘⡗⣻⢼⡏⠙⣷⢸⠀⠀⠀⠀⠀⠀⠺⢹⡇⠀⢹⡯⣿⡿⣿⡏⣿⡇⠀⢸⠀⠁ ⠀⠀⠀⠀⠀⠀⠈⢀⡇⠀⢸⡇⠁⠀⠀⠀⠀⠀⠀⠀⣿⠀⠀⡷⠋⢸⠁⠀⣿⠨⠂⠀⠀⠀⠀⠀⠀⢸⡇⠀⢸⠆⣿⠀⢸⡇⢾⡇⠀⢸⠃ ⠀⠀⠀⠀⠀⠀⠀⠘⡇⠀⢸⡇⠀⠀⠀⠀⠀⠀⠀⠀⣋⠀⠀⡇⠀⢸⠀⠀⣿⠀⠀⠀⠀⠀⠀⠀⠀⢈⡇⠀⢸⡁⡿⠀⠸⣇⡼⠃⠀⠸⢤ ⠀⠀⠀⠀⠀⠀⠀⠴⠃⠀⠘⠦⠀⠀⠀⠀⠀⠀⠀⠚⠁⠀⠀⠉⠂⣸⠀⠀⣌⠀⠀⠀⠀⠀⠀⠀⠈⠉⠀⠀⠀⠉⡇⠀⠀⡇ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠁⠀⠀⠀⠉⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠤⠃⠀⠀⠣⠄