A method and a system for calibrating a surround sound system are disclosed. The calibration system can provide a graphical user interface for display comprising a visual representation of the room hosting a multichannel surround sound system. The graphical user interface can permit user input of gestures to place or make changes to the placement of icons representing one or more loudspeakers and a listener. The calibration system can estimate the positions of the one or more loudspeakers or the listener based on the placement of the icons in the model room. A spatial calibration based on the estimated positions can then be performed such that the multichannel surround sound system can render sound scenes more accurately.

Embodiments of systems and methods are described for estimating a position of a loudspeaker and notifying a listener if an abnormal condition is detected, such as an incorrect loudspeaker orientation or an obstruction in a path between the loudspeaker and a microphone array. For example, a front component of a multi-channel surround sound system may include the microphone array and a position estimation engine. The position estimation engine may estimate the distance between the loudspeaker and the microphone array. In addition, the position estimation engine may estimate an angle of the loudspeaker using a first technique. The position estimation engine may also estimate an angle of the loudspeaker using a second technique. The two angles can be processed to determine whether the abnormal condition exists. If the abnormal condition exists, a listener can be notified and be provided with suggestions for resolving the issue in a graphical user interface.

A method of processing an audio signal is provided. The method includes acquiring location information and performance information of a speaker configured to output an audio signal, selecting a frequency band based on the location information, determining a section to be strengthened from the selected frequency band with respect to the audio signal based on the performance information, and applying a gain value to the determined section.

An example method is performed by a media playback system comprising a plurality of audio drivers having a first radiation pattern. The method includes receiving data representing audio content, where each datum of the data indicates (i) a frequency and (ii) an amplitude corresponding to the frequency. The method further includes, for each audio driver of the plurality of audio drivers, determining a transfer function; processing each datum of the data based on (i) the frequency indicated by the given datum and (ii) the determined transfer function; and providing, to the given audio driver, a respective signal representing the data processed for the given audio driver, thereby causing the plurality of audio drivers to play back the audio content according to a second radiation pattern that is different from the first radiation pattern. An example media playback system and an example non-transitory computer-readable medium related to the example method is also disclosed herein.

A sound field control system SY according to the present invention is provided with: a signal supply unit 210 which supplies a test signal sequence to a speaker; and an analysis unit 150 which picks up a sound including a test sound sequence emitted from a speaker based on a test signal sequence using a microphone, and which determines the sound pickup time of an initial test sound among test sounds included in the test sound sequence, wherein the analysis unit 150 detects the initial sound from the sound pickup signal picked up using the microphone, determines whether a sound is detected after the elapse of a sound emission interval, from the sound pickup time of the detected initial sound, between the initial test sound defined by the test signal sequence and an n-th (where n is an integer such that n2) test sound emitted from the same speaker as the initial test sound, and, upon determining that the sound has been detected, determines the sound pickup time of the initial sound as the sound pickup time of the initial test sound.

A method of processing an audio signal includes obtaining filter functions for audio signals, the filter functions determined according to predetermined locations of a plurality of speakers; obtaining location information of the plurality of speakers via which the audio signals are to be output; correcting the filter functions based on the location information; and processing the audio signals by using the corrected filter functions.

A sound reproduction system includes an electro-acoustic transducer and a transducer driver for driving the electro-acoustic transducer. The transducer drive includes a filter which is configured to reproduce at a listener's location an approximation to the local sound field that would be present at the listener's ears in recording space, taking into account the characteristics and intended position of the electro-acoustic transducer relative to the listener's ears. The electro-acoustic transducer includes a first sound emitter which provides an intermediate sound emission channel, and second and third sound emitters providing respective left and right sound emission channels. The first sound emitter is located intermediate of second and third sound emitters. Higher frequencies from at least one of the second and third sound emitters are transmitted closer to the first sound emitter while lower frequencies are transmitted away from the first sound emitter.

A seat integrating a loudspeaker system includes a seat having a seat body with a horizontally oriented seat bottom and a seat back secured thereto. The seat back includes an upper end and a lower end, wherein the lower end is positioned adjacent the seat bottom. The loudspeaker system includes a sound assembly mounted within the seat for selective movement between a storage orientation in which the sound assembly is housed and hidden within a support housing mounted along the seat and a use orientation extending from the support housing in which the sound assembly is positioned for use.

An audio signal processing method and an audio signal processing apparatus for synchronizing audio based on synchronization error between audio signals.

The disclosure describes a method for a multi-channel speaker system including N speakers. The method may comprise obtaining N! permutations of channel sequence for the N speakers; determining, for each permutation, a voting score that represents the matching degree between the channel sequence indicated in a permutation and a correct channel assignment sequence of the N speakers; selecting the permutation with the highest voting score; and assigning input source channels to the N speakers in the order of the channel sequence indicated in the selected permutation.