Audio playback refers to the process of reproducing sound from a digital or analog source. This can include music, spoken word, or sound effects, which are played back through devices like speakers or headphones. The audio is typically stored in formats such as MP3, WAV, or AAC, allowing for easy access and playback on various devices. During audio playback, the device decodes the stored audio data and converts it into sound waves. This process involves digital-to-analog conversion, where the digital signals are transformed into electrical signals that drive the speakers. Common playback devices include smartphones, computers, and media players.