Sound processing apparatus and method

A method for setting volume of a sound signal by a processor, comprising:

• a first adjustment step of adjusting volume of an input sound signal, the sound signal having the volume adjusted by the first adjustment step being sent to a first output destination;
• a second adjustment step of adjusting the volume of the sound signal before being subjected to the volume adjustment by the first adjustment step or the sound signal after having been subjected to the volume adjustment by the first adjustment step, the sound signal having the volume adjusted by the second adjustment step being sent to a second output destination different from the first output destination;
• a step of selecting one of the sound signal before being subjected to the volume adjustment by the first adjustment step and the sound signal after having been subjected to the volume adjustment by the first adjustment step, the sound signal selected by the step of selecting being input to the second adjustment step for volume adjustment;
• and
• a step of, in response to the selection by the step of selecting being changed, changing the volume adjustment by the second adjustment step based on a volume difference between the sound signal before the volume adjustment by the first adjustment step and the sound signal after the volume adjustment by the first adjustment step.

A computer-readable, non-transitory storage medium storing a group of instructions executable by a processor for performing a method for adjusting volume in a sound processing apparatus, the sound processing apparatus comprising:

• a first adjuster that adjusts volume of an input sound signal, the sound signal having the volume adjusted by the first adjuster being sent to a first output destination;
• a second adjuster that adjusts the volume of the sound signal before being subjected to the volume adjustment by the first adjuster or the sound signal after having been subjected to the volume adjustment by the first adjuster, the sound signal having the volume adjusted by the second adjuster being sent to a second output destination different from the first output destination;
• and a selector that selects one of the sound signal before being subjected to the volume adjustment by the first adjuster and the sound signal after having been subjected to the volume adjustment by the first adjuster, the sound signal selected by the selector being input to the second adjuster for volume adjustment, the method comprising:
• a step of, in response to the selection by the selector being changed, changing the volume adjustment by the second adjuster based on a volume difference between the sound signal before the volume adjustment by the first adjuster and the sound signal after the volume adjustment by the first adjuster.