For playback, digital audio need to be converted back again to an analog signal by using a DAC. In accordance with the Nyquist–Shannon sampling theorem, with a few useful and theoretical restrictions, a band-minimal version of the first analog sign can be properly reconstructed from the digital sign. Coaxial cables https://medium.com/@betsyahlynnah/what-audiobook-platforms-offer-offline-listening-8c9bee40b1a1