Signal generation device, signal generation method and non-transitory computer-readable storage medium

A signal generation method comprising:

• generating a sound signal, via a signal generation device, based on key operation data associated with operation of a key;
• and
• controlling a decay speed of the sound signal based on pedal operation data associated with a pedal operation position,
• wherein controlling the decay speed of the sound signal includes:
• determining a first boundary position indicating a first boundary between a first range in a changeable range of the pedal operation position and a second range adjacent to the first range based on control information obtained by the operation of the key;
• and
• controlling the decay speed to a first speed in a case where the pedal operation position is in the first range, and to a second speed greater than the first speed in a case where the pedal operation position is in the second range.

A non-transitory computer-readable storage medium having stored thereon a program for causing a computer to execute operations comprising:

• generating a sound signal, via a signal generation device, based on key operation data associated with operation of a key;
• and
• controlling a decay speed of the sound signal based on pedal operation data associated with a pedal operation position,
• wherein controlling the decay speed of the sound signal includes:
• determining a first boundary position indicating a first boundary between a first range in a changeable range of the pedal operation position and a second range adjacent to the first range based on control information obtained by the operation of the key;
• and
• controlling the decay speed to a first speed in a case where the pedal operation position is in the first range, and to a second speed greater than the first speed in a case where the pedal operation position is in the second range.