digital disc

Digital sound recording transforms audio signals into binary digits (0s and 1s) for storage on magnetic tape or optical discs. This method samples the sound wave thousands of times per second, assigning numerical values to its amplitude. A key advantage is its high fidelity, as digital signals are less susceptible to noise and distortion compared to analog methods.1

The compact disc (CD) is a prime example of digital disc technology. Introduced in 1982, it uses a laser to read digital data encoded as microscopic pits and lands on the disc's surface. This technology has largely replaced older formats like the phonograph record for music playback due to its superior sound quality and durability. Other digital disc formats, such as DVDs and Blu-ray discs, have further increased storage capacity for various types of data.23