An acoustic system using a mobile storing medium and a control method therefor are provided to maintain favorite music in the mobile storing medium by storing a sound source inputted to an acoustic device and music information about the sound source in the mobile storing medium like a UFD(USB(Universal Serial Bus) Flash Drive), an SD(Secure Digital) card, and an MMC(MultiMedia Card). A microphone(11) receives an analog sound source. An acoustic device(20) includes an acoustic play unit(21), a mobile storing medium port(23), and an internal storing unit(22). The acoustic play unit(21) plays the analog sound source received through the microphone(11) together with an accompaniment previously stored. The mobile storing medium port(23) provides an interface to synchronize the analog sound source and the accompaniment played in the acoustic play unit(21), encode the synthesized sound, and store the generated digital audio data in a connected mobile storing medium(30). The internal storing unit(22) stores the analog sound source and the accompaniment played in the acoustic play unit(21) together. The mobile storing medium(30) connects to the acoustic device(20) through the mobile storing medium port(23), and stores the analog sound source and the accompaniment played in the acoustic device(20). The mobile storing medium(30) receives and stores an information file of music corresponding to the accompaniment from the acoustic device(20).
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