A signal processing device includes: a calculating unit performing calculation using signal levels of first and second acoustic signals; a determining unit, based on a result of a comparison between: the signal level of at least one of the first and second acoustic signals before the calculation; and a result of the calculation, determining whether a component of a third acoustic signal to be output from a position between a position from which the first acoustic signal is output and a position from which the second acoustic signal is output is included in the first and second acoustic signals; and a signal generating unit generating the third acoustic signal from the first and second acoustic signals when the determining unit determines that the component of the third acoustic signal is included in the first and second acoustic signals.

Systems and methods can provide an elevated, virtual loudspeaker source in a three-dimensional soundfield using loudspeakers in a horizontal plane. In an example, a processor circuit can receive at least one height audio signal that includes information intended for reproduction using a loudspeaker that is elevated relative to a listener, and optionally offset from the listener's facing direction by a specified azimuth angle. A first virtual height filter can be selected for use based on the specified azimuth angle virtualized audio signal can be generated by applying the first virtual height filter to the at least one height audio signal. When the virtualized audio signal is reproduced using one or more loudspeakers in the horizontal plane, the virtualized audio signal can be perceived by the listener as originating from an elevated loudspeaker source that corresponds to the azimuth angle.

A system for listening to binaural audio through a plurality of speakers having at least two pair of speakers, incorporating applying at least two Crosstalk Cancellation Filter to a corresponding at least two binaural signals to create a corresponding at least two pair of speaker signals, and inputting the at least two pairs of speakers signals to a corresponding at least two pairs of speakers of a plurality of speakers. The invention also relates to a system and method for listening to binaural audio through a plurality of speakers by dividing the speakers into groups, generating a Crosstalk Cancellation Filter for each group, and distributing the binaural audio among the speaker groups. The invention also relates to a system for placing a binaural audio signal onto a plurality of pairs of cross talk cancelled loudspeakers.

Aspects of the present disclosure relate to techniques for processing a source audio signal in order to localize sounds. In particular, aspects of the present disclosure relate to sound localization techniques which externalize sounds for headphone audio, such as a virtual surround sound headphone system. In various implementations, room reverberations and other acoustic effects of the environment may be more accurately modeled using improved room reverberation models. For example, in some implementations, the underlying source signal may be filtered with a filter representing a room impulse response that is a combination of a stereo room impulse response and a mono room impulse response. By way of further example, in some implementations the source signal may be filtered with a combined impulse response filter that is derived from binaural recordings of simulated impulses recorded in a desired reverberant environment.

Example techniques involve outputting multiple audio channels using a multiple driver playback device. An example playback device receives a first and second channel of audio content. The playback device plays back play back the first channel via a first group of audio transducers such that the first group of audio transducers form, via superposition, a first response lobe having a maximum in a first direction. Further, the playback device plays back the second channel via a second group of audio transducers such that the second group of audio transducers form, via superposition, a second response lobe having a maximum in a second direction that is separated by an angle of at least 45° from the first direction.

A virtual reproduction signal generation unit generates a virtual reproduction signal based on a sound pickup signal of a stereophonic sound at a listening position in a compartment, assuming that virtual speakers are respectively located at portions of Np positions in a vehicle, the virtual reproduction signal causing the virtual speakers of the Np positions to reproduce the stereophonic sound. A virtual prediction signal generation unit generates a virtual prediction signal based on the virtual reproduction signal and an information representing a change of acoustic characteristics when at least part of the portions of the Np positions is changed, the virtual prediction signal causing the virtual speakers of the Np positions to output a predicted sound at the listening position. An output signal generation unit generates an output signal based on the virtual prediction signal, the output signal causing speakers of a plurality of positions to output the predicted sound.

Disclosed is an audio signal processing method including: receiving a stereo signal; transforming the stereo signal into a frequency-domain signal; rendering the first signal based on a first ipsilateral filter coefficient; generating a frontal ipsilateral signal relating to the frequency-domain signal; rendering the second signal based on a second ipsilateral filter coefficient; generating a side ipsilateral signal relating to the frequency-domain signal; rendering the second signal based on a contralateral filter coefficient; generating a side contralateral signal relating to the frequency-domain signal; transforming an ipsilateral signal, generated by mixing the frontal ipsilateral signal and the side ipsilateral signal, and the side contralateral signal into a time-domain ipsilateral signal and a time-domain contralateral signal, which are time-domain signals, respectively; and generating a binaural signal by mixing the time-domain ipsilateral signal and the time-domain contralateral signal.

Embodiments are directed to a speaker system that contains an array of multiple dispersion drivers that creates an expansive acoustic pattern to playback multi-channel audio content through a standalone speaker. The speaker system comprises an interface receiving stereo audio; an upmixer generating surround sound formatted audio from the stereo audio including one or more height channels; a virtualizer/downmixer component coupled to the upmixer and generating speaker feeds for two or more loudspeaker output sections, configured to play back the stereo audio, wherein each output section is further configured to play its own dedicated stereo audio signals; and a set of drivers each coupled to a respective output section and configured to project sound in at least two different dispersion patterns.

Systems and methods for rendering spatial audio in accordance with embodiments of the invention are illustrated. One embodiment includes a spatial audio system, including a primary network connected speaker, including a plurality of sets of drivers, where each set of drivers is oriented in a different direction, a processor system, memory containing an audio player application, wherein the audio player application configures the processor system to obtain an audio source stream from an audio source via the network interface, spatially encode the audio source, decode the spatially encoded audio source to obtain driver inputs for the individual drivers in the plurality of sets of drivers, where the driver inputs cause the drivers to generate directional audio.

Example techniques involve outputting multiple audio channels using a multiple driver playback device. An example playback device receives a first and second channel of audio content. The playback device plays back play back the first channel via a first group of audio transducers such that the first group of audio transducers form, via superposition, a first response lobe having a maximum in a first direction. Further, the playback device plays back the second channel via a second group of audio transducers such that the second group of audio transducers form, via superposition, a second response lobe having a maximum in a second direction that is separated by an angle of at least 45° from the first direction.