Audiovisual presentation device and signal processing device

A signal processing device for an audiovisual presentation device comprising:

• a display unit in which light-emitting elements for displaying a video are arranged in an array on a substrate, and which has a plurality of fine holes formed in the substrate;
• a speaker unit having speakers that output sound according to an audio signal to an air chamber;
• a plurality of sound conduits connecting the air chamber and the plurality of fine holes;
• a plurality of opening/closing mechanisms for individually opening/closing the plurality of sound conduits;
• and
• a plurality of micro speakers arranged in an array on the substrate of the display unit to output a higher-frequency sound than the speakers of the speaker unit, the signal processing device comprising:
• an opening/closing control unit that controls opening/closing by the plurality of opening/closing mechanisms;
• a selector unit that controls selection of the plurality of micro speakers;
• and
• a controller that controls the opening/closing control unit and the selector unit according to a position of a sound source on a video displayed on the display unit.