| 摘要 |
PROBLEM TO BE SOLVED: To enable automatic playing by using a naturally spoken voice as a trigger including a case of portamento. SOLUTION: A ROM 2 is stored with automatically played music consisting of pieces of pitch data. A microphone 9 inputs an inputted voice signal to an AD converter 6. The AD converter 5 samples the voice signal according to timer interruption of a timer circuit 4 and stores sampled data in a RAM 3 according to a write indication from a CPU 1. The CPU 1 advances the address of the ROM 2 each time the CPU detects a voice signal of higher than a specific level or variation in the pitch of the voice signal of higher than the specific level exceeding a specific range, and pitch data in the advanced address is read out and outputted to a sound source circuit 7. |
