How does digital recording turn sound waves into binary information?

Digital recording preserves sound by transforming continuous audio signals into a series of binary digits (0s and 1s). This process is primarily managed by an analog-to-digital converter, which functions through the following steps:

• Sampling: The system samples the sound’s waveform—or its amplitude—thousands of times per second.1
• Quantization: At each of these specific instants, the system assigns a numerical value to the amplitude of the signal.1
• Encoding: These numerical values are converted into binary digits, creating a series of pulses that represent the original audio information.12

Once encoded, this digital data can be stored on media such as optical discs or magnetic tape. To reproduce the sound, a digital-to-analog converter reads the binary information and reconstructs it back into continuous audio signals suitable for an amplifier. This method is highly effective because binary pulse patterns are largely immune to the noise and distortion that often affect analog recording systems.1