| 摘要 |
PURPOSE: To improve a digital sound because when, for example, a person depresses the accelerator provided at the simulation driving seat of a racing car as a game machine, the digital sound made to resemble to an engine sound is reproduced according to the depressing amount and then the person can taste a feeling like driving the racing car but the digital sound has not been able to reproduce the power had by the sound of a real car and the taste of the highly individual engine sound of the real car which is different in the kinds of the real cars. CONSTITUTION: The analog voltage signal taken in by a voltage detector 33 is converted into a digital voltage signal by an A/D conversion circuit 35. In a ROM 41, sections determined by subdividing magnitudes of the digital voltage signals previously are stored and real engine sounds having the speeds of revolutions corresponding to magnitudes of digital voltage signals which are almost determined by sections are recorded as digital signals and then the digital signals are stored for every section in corresponding areas. A control device 39 reads out the section corresponding to the digital signal and reads out the digital signal stored in the area corresponding to the section. Then, the read out digital signal of an engine is converted into an analog signal by a D/A conversion circuit 53 and the analog signal is amplified by an amplifier to be reproduced as a real engine sound in a speaker. |
