The invention relates to an audio generation method, an audio playing method, an audio receiving method, an audio generation device, an audio playing device, an audio receiving device and an audio transmission system. The receiving method comprises the steps of: generating an identification code uniquely corresponding to an audio stream to be coded; according to the duration corresponding to the audio stream, generating continuous time coding sequences; combining the identification code, the time coding sequences and a corresponding lead code, so that a corresponding data packet is formed; coding the formed data packet, so that an audio sequence is obtained; modulating the audio sequence corresponding to the audio stream obtained by coding, and generating a corresponding audio file; and sending the generated audio file to the corresponding audio playing device. By adoption of the scheme, the transmission speed of the audio stream can be increased while the identification success rate is compatible.