tracks to perform a function of singing by various singers the setting area 460 may set a singing technique setting by which various singing techniques may be set editing key editing screen option and the like these areas are provided through the lyrics editing unit 210 for editing lyrics the sound source editing unit 220 for editing a sound source the vocal effect editing unit 240 for editing a vocal effect and the singer and track editing unit 250 for selecting a singer sound source corresponding to a vocal part and editing various tracks and the information edited by the editing unit is acquired by a central control unit not shown to be transmitted to the voice synthesis transmission server the voice synthesis transmission server 300 includes a client multiple connection management unit 310 for managing music synthesis requests of a plurality of client terminals in sequence or in parallel such that the plurality of client terminals simultaneously connect to the voice synthesis server to issue voice synthesis requests a music data compression processing unit 320 for compressing music data to efficiently transmit the music data in a restricted network environment a music data transmission unit 330 for transmitting music information synthesized in response to the music synthesis request of the client terminal to a client and an additional service interface processing unit 340 for.