Non-transitory storage medium having stored therein sound processing program, non-transitory storage medium having stored therein information processing program, sound processing method, sound processing device, and non-transitory storage medium having stored therein game program

1. A non-transitory storage medium having stored therein a game program which, when executed by a computer, causes the computer to perform operations comprising:

acquiring sound data;

setting, in a virtual space, a virtual sound source configured to virtually produce sound based on the sound data and a virtual microphone configured to virtually capture the sound virtually produced by the virtual sound source;

determining the Doppler effect for the sound produced by the virtual sound source and virtually captured by the virtual microphone based on a first speed of movement in the virtual space of the virtual sound source and/or on a second speed of movement in the virtual space of the virtual microphone, wherein, in the determining of the Doppler effect, the first speed is clamped to a first maximum speed when the first speed of movement in the virtual space of the virtual sound source exceeds the first maximum speed and/or the second speed is clamped to second maximum speed when the second speed of movement in the virtual space of the virtual microphone exceeds the second maximum speed;

modifying the sound virtually captured by the virtual microphone according to the determined Doppler effect; and

outputting the modified sound.

2. The non-transitory storage medium according to claim 1 ,

wherein a position of the virtual sound source in the virtual space is associated with a position of a first object in the virtual space, and

a position of the virtual microphone in the virtual space is associated with a position of a second object in the virtual space.

3. The non-transitory storage medium according to claim 2 ,

wherein the second object comprises a player object moving in the virtual space in response to a user operation.

4. A sound processing method comprising:

acquiring sound data;

setting, in a virtual space, a virtual sound source configured to virtually produce sound based on the sound data and a virtual microphone configured to virtually capture the sound virtually produced by the virtual sound source;

determining the Doppler effect for the sound produced by the virtual sound source and virtually captured by the virtual microphone based on a first speed of movement in the virtual space of the virtual sound source and/or on a second speed of movement in the virtual space of the virtual microphone, wherein, in the determining of the Doppler effect, the first speed is clamped to a first maximum speed when the first speed of movement in the virtual space of the virtual sound source exceeds the first maximum speed and/or the second speed is clamped to second maximum speed when the second speed of movement in the virtual space of the virtual microphone exceeds the second maximum speed;

modifying the sound virtually captured by the virtual microphone according to the determined Doppler effect; and

outputting the modified sound.

5. A sound processing device comprising:

a controller for receiving a user operation;

storage configured to store therein sound data; and

a processor configured to at least:

set, in a virtual space, a virtual sound source configured to virtually produce sound based on the sound data and a virtual microphone configured to virtually capture the sound virtually produced by the virtual sound source; determine the Doppler effect for the sound produced by the virtual sound source and virtually captured by the virtual microphone based on a first speed of movement in the virtual space of the virtual sound source and/or on a second speed of movement in the virtual space of the virtual microphone, wherein, in the determining of the Doppler effect, the first speed is clamped to a first maximum speed when the first speed of movement in the virtual space of the virtual sound source exceeds the first maximum speed and/or the second speed is clamped to second maximum speed when the second speed of movement in the virtual space of the virtual microphone exceeds the second maximum speed; and

modify the sound virtually captured by the virtual microphone according to the determined Doppler effect; and

a speaker configured to output the modified sound.

6. A non-transitory storage medium having stored therein a game program which, when executed by a computer connected to a controller for receiving a user operation, storage for storing therein sound data, and a speaker, causes the computer to perform operations comprising:

setting at least a first object and a second object in a virtual space;

receiving, from the controller, an instruction to move the second object in the virtual space;

reading, from the storage, sound data associated with the first object within a predetermined distance from the second object in the virtual space;

acquiring sound data for producing sound by the first object;

moving the second object in response to the instruction to move;

determining the Doppler effect for the sound produced by the first object and virtually captured by the second object based on a first speed of movement in the virtual space of the first object and/or on a second speed of movement in the virtual space of the second object, wherein, in the determining of the Doppler effect, the first speed is clamped to a first maximum speed when the first speed of movement in the virtual space of the virtual sound source exceeds the first maximum speed and/or the second speed is clamped to second maximum speed when the second speed of movement in the virtual space of the virtual microphone exceeds the second maximum speed;

modifying the sound virtually captured by the second object according to the determined Doppler effect; and

outputting the modified sound from the speaker.