The new film sound reproducting method adopts CD as the sound carrier and realizes the dynamic synchronization between the film picture and sound signal by means of recording special positioning codesignal on the coated magnetic tape of film. One special CD sound reproducing machine is also dislcosed, which comprises power supply, input circuit, decoder main control circuit and CD-ROM. The special positioning code signal into the machine via the input circuit is decoded, and the main control circuit controls the operation of the CD-ROM based on the decoded positioning code information and the radio signal output by the CD-ROM is fed to sound box or other equipment via interface. The special CD is also disclosed, which has separate continuous audio signal in its right and left sound channels and the start end of one channel is connected to the tail end of the other channel.