Audio signal processing device based on orientation

An audio signal processing device, comprising:

• an audio signal analysis unit configured to acquire an audio signal, and configured to set a target value for an audio adjustment based on the audio signal;
• an orientation variation analysis unit configured to acquire orientation information, and configured to generate an orientation variation amount based on the orientation information;
• and
• an audio signal adjustment unit configured to adjust the audio signal toward the target value based on the orientation variation amount,
• wherein the audio signal adjustment unit is configured to adjust the audio signal to lower a volume of the audio signal based on a determination that the orientation variation amount becomes larger than a first threshold value, and
• based on a determination that the audio signal reaches the target value, and the orientation variation amount becomes smaller than a second threshold value, the audio signal adjustment unit is configured to adjust the audio signal to return the volume of the audio signal.