How to program piezo buzzer without the tone() library? - Programming Questions - Arduino Forum
Use tone() with Arduino for an Easy Way to Make Noise - Programming Electronics Academy
Button-controlled music (Solved) - Programming Questions - Arduino Forum
millis() Tutorial: Arduino Multitasking - Bald Engineer
Arduino tutorial (Part 9, music and 4x4 keypad) - Electrical e-Library.com
How to make buzzer sound in Arduino | Step by step instructions - SriTu Hobby
USE a BUZZER MODULE (PIEZO SPEAKER) USING ARDUINO UNO - Arduino Project Hub
GitHub - PaulStoffregen/MusicWithoutDelay-LIbrary: A User-friendly Arduino Library that allows Music(chiptunes) to be played without delay. No shields needed(Just a speaker).
Coding Timers and Delays in Arduino : 8 Steps - Instructables