Resonance Signal Generating Method, Resonance Signal Generating Device, Electronic Musical Apparatus and Non-Transitory Computer Readable Medium

A resonance signal generating device comprising:

• a first resonance signal generator that includes a first loop including a first delayer that delays a signal by a time corresponding to a specific pitch and a first attenuator that attenuates the signal, and an excitation inputter that inputs an excitation signal to the first loop;
• a second resonance signal generator that includes a second loop including a second delayer that delays the signal by a time corresponding to the specific pitch and a second attenuator that attenuates the signal;
• an inversion inputter that generates an attenuation change signal by adding a first resonance signal circulating through the first loop and a second resonance signal circulating through the second loop to each other, attenuating and inverting the added first and second resonance signals, and inputs the generated attenuation change signal to the first loop and the second loop;
• and
• an outputter that outputs the first resonance signal circulating through the first loop.

A non-transitory computer readable medium storing a program allowing a computer to:

• generate a first resonance signal of a specific pitch circulating through first loop processing by inputting an excitation signal to the first loop processing including first delay that delays the signal by a time corresponding to the specific pitch and first attenuation that attenuates the signal;
• generate a second resonance signal of the specific pitch circulating through second loop processing by the second loop processing including second delay that delays the signal by a time corresponding to the specific pitch and second attenuation that attenuates the signal;
• generate an attenuation change signal by adding the first and second resonance signals to each other, attenuating and inverting the added first and second resonance signals, and inputting the generated attenuation change signal to the first loop processing and the second loop processing respectively;
• and
• output the first resonance signal.