Sound signal generation device, keyboard instrument, and sound signal generation method

A sound signal generation device comprising:

• a memory storing instructions;
• and
• a processor that implements the instructions and execute a plurality of tasks, including:
• a signal generation task that generates a sound signal based on first operation data corresponding to an operation to a key, the first operation data including an operation velocity of the key;
• and
• an attenuation control task that:
• sets an attenuation velocity of the sound signal to one of at least a first attenuation velocity or a second attenuation velocity that is faster than the first attenuation velocity, based on both the first operation data and second operation data corresponding to an operation to a pedal;
• and
• in a state where the attenuation velocity is set to the second attenuation velocity, sets a value of the second attenuation velocity based on an output level of the sound signal.

A sound signal generation method comprising:

• generating a sound signal based on first operation data corresponding to an operation to a key, the first operation data including an operation velocity of the key;
• setting an attenuation velocity of the sound signal to one of at least a first attenuation velocity or a second attenuation velocity that is faster than the first attenuation velocity, based on both the first operation data and second operation data corresponding to an operation to a pedal;
• and
• in a state where the attenuation velocity is set to the second attenuation velocity, setting a value of the second attenuation velocity based on an operation velocity of the key or a pitch associated with the key.