When Wish you were here starts, it sounds like it is coming from an AM radio somewhere in the distance. The radio was recorded from David Gilmour’s car radio. He performed the intro on a twelve-string guitar, processed to sound like it was playing through a car AM radio, and then overdubbed a fuller-sounding acoustic guitar solo. This passage was mixed to sound as though the guitarist were sitting in a car, listening to the radio; it also contains a whine that slowly changes pitch—emulating the electro-magnetic interference from the engine of a car as it accelerates and decelerates. The master tape of the original recording includes an entire performance of pedal steel guitar, played by David Gilmour, that was not used in the final mix.