Signal generation method, display control method, and program

A signal generation method comprising:

• displaying
• a first area including a first image corresponding to a first parameter for controlling a generated sound of a first track, the first parameter including phoneme information or pitch information,
• a second area including a second image corresponding to a second parameter for controlling the generated sound of the first track, and
• a third area including a third image corresponding to a third parameter for controlling a generated sound of a second track;
• displaying the first image and the third image that correspond to a current playback position in the first area and the third area in response to receiving a start playback instruction;
• generating a first sound signal of the first track and a second sound signal of the second track, the first sound signal and the second signal corresponding to the playback position;
• outputting a mixed sound of the first sound signal and the second sound signal;
• and
• in response to receiving an instruction to change the second parameter after the start playback instruction, reflecting the second parameter that has been changed on the first sound signal at the playback position.

A display control method comprising:

• determining a control value for controlling generated sounds in accordance with a passage of time based on an instruction value from an operator and a setting value determined in advance in a time series;
• generating a sound signal based on the control value and sound control data for generating the generated sounds corresponding to the passage of time;
• and
• displaying a setting image including a first image area for indicating the instruction value and a second image area adjacent to the first image area for indicating the control value.

A display control method comprising:

• displaying, in a prescribed display area,
• a first image corresponding to a sound signal generated based on sound control data for controlling generated sounds corresponding to a passage of time, the sound control data including a first parameter and a second parameter, and
• a second image including an image related to the second parameter;
• changing a position of the second image in the prescribed display area in accordance with an input instruction;
• and
• moving the first image to an area that satisfies a predetermined condition from among a plurality of areas obtained by dividing the prescribed display area with the second image as reference, in response to changing the position of the second image.