Acoustic system with spatial effect

An acoustic system designed for diffusing sound from N channels comprising audio frequencies, N being greater than or equal to two, the acoustic system comprising:

• a frame,
• M loudspeakers structurally similar to each other and mounted on the frame, M being greater than or equal to two, and
• a processing unit designed for sending M loudspeaker signals to the respective loudspeakers,
• wherein:
• the loudspeakers are arranged at an angle about an axis intended to be substantially vertical, two successive loudspeakers forming an angle substantially equal to 360° divided by M, and
• the processing unit comprises a splitter configured to produce the loudspeaker signals,
• each loudspeaker signal comprising a same shared bass component obtained from at least one of the channels, and in which the audio frequencies that are higher than a predetermined first frequency are non-existent or reduced,
• at least two of the loudspeaker signals further comprising a specific component in addition to the shared bass component and in which the audio frequencies below the first frequency are non-existent or reduced, each specific component being obtained from at least one of the channels, and
• at least two of the specific components being different from each other,
• wherein the acoustic system further comprises a frequency selector adapted to produce, from each channel, on the one hand a low frequency signal in which the audio frequencies of the channel higher than the first frequency are non-existent or reduced, and on the other hand, if said channel comprises audio frequencies that are higher than the first frequency, at least one other signal in which the audio frequencies of the channel lower than the first frequency are non-existent or reduced,
• the shared bass component being proportional to the sum of the low frequency signals,
• the specific components being obtained from the other signals, and
• wherein the frequency selector is further configured to extract, from each respective channel comprising audio frequencies that are higher than a predetermined second frequency, a high-frequency signal in which the audio frequencies of said channel lower than the second frequency are non-existent or reduced, the second frequency being higher than the first frequency, the frequency selector being configured so that, in each of the other signals, the audio frequencies that are higher than the second frequency are non-existent or reduced;
• and at least one of the loudspeaker signals formed by the splitter further comprises a shared high frequency component proportional to the sum of the high frequency signals, the shared high frequency component being added to the shared bass component.