MUSICAL TONE SIGNAL GENERATOR AND MUSICAL TONE SIGNAL GENERATION METHOD

摘要

PROBLEM TO BE SOLVED: To embody the effect of the damper pedal of an acoustic piano and more particularly a resonance effect when the damper pedal 1 is treaded after a key touch by a simple constitution. ;SOLUTION: A CPU 5 monitors the states of the damper pedal 1 and a keyboard 2. The CPU reads a rising coefft. (a) out of a ROM 3 and outputs the coefft. to a DSP 7 when the keyboard 2 is pressed in the state that the damper pedal 1 is held treaded. The CPU reads the rising coefft. (b) out of the ROM 3 and outputs the coefft to the DSP 7 conversely when the damper pedal 1 is treaded after the keyboard 2 is pressed. The DSP 7 imparts mimic resonance tones to the original tones from a sound source circuit 6 and outputs the tones to a DAC 8. At this time, the DSP 7 changes the envelopes of the mimic resonance tones according to the rising coefft. (a) or (b) from the CPU 5. If the rising coefft. (a) is inputted, the values of the rising coeffts. (a) and (b) are previously so set that the rising of the mimic resonance tones is made faster than in the case the rising coefft. (b) is inputted.;COPYRIGHT: (C)1998,JPO