| 摘要 |
PROBLEM TO BE SOLVED: To facilitate karaoke reservation of a music piece which a user has heard of.SOLUTION: A karaoke device 10 generates acoustic signals indicating tones of a music piece (S1), acquires a music piece ID discriminating the music piece (S2), and emits sound indicated by the acoustic signals after superposing the music piece ID on the generated acoustic signals (S3 and S4). A terminal device 20 acquires the acoustic signals indicating the tones of the music piece (S5) and extracts the music piece ID from the acquired acoustic signals (S6). The terminal device 20 transmits a music piece number transmitting request including the extracted music piece ID, and acquires the music piece number required for karaoke performance reservation from a service server 30 (S7-S9). The terminal device 20 uses the acquired music piece number to carry out performance reservation of the karaoke music piece corresponding to the music piece ID (S10 and S11). When receiving the performance reservation of the karaoke music piece from the terminal device 20, the karaoke device 10 starts performing the karaoke music piece specified by the music piece number and generates the acoustic signals (S12 and S13). |
