A printed audio format includes a printed encoding of an audio signal, and a plurality of spaced-apart and parallel rails. The printed encoding of the audio signal is located between the plurality of rails and each rail comprises at least one marker. The printed encoding comprises a first portion and a second portion, each portion comprises a plurality of code frames, and each frame represents a time segment of an audio signal. The first portion encodes a first time period of the audio signal and the second portion encodes a second time period of the audio signal. The second portion is encoded in reverse order with respect to the first portion so that the joining part is on the same end of both portions.