Radio has since the mid 1990 moved towards digital signals, and by now almost all conventional radio receivers do not covert electromagnetic waves into sound waves. They covert electromagnetic waves into a digital sound file, which then get copied into local memory and run inside a software program that plays the sound (and generally outputs meta data). It can also buffer sound if it wants to.
As a interesting side-note, Norway has stopped using FM radio in favor of digital radio, and Sweden is on route to do the same. The primary argument here on Sweden in favor of keeping FM radio is that older car models might still not be compatible with digital radio, and the FM radio could in theory be useful case of national emergency.
As a interesting side-note, Norway has stopped using FM radio in favor of digital radio, and Sweden is on route to do the same. The primary argument here on Sweden in favor of keeping FM radio is that older car models might still not be compatible with digital radio, and the FM radio could in theory be useful case of national emergency.