Methods and devices used in mobile receiver front end to support multiple paths and multiple frequency bands are described. The presented devices and methods provide benefits of scalability, frequency band agility, as well as size reduction by using one low noise amplifier per simultaneous outputs. Based on the disclosed teachings, variable gain amplification of multiband signals is also presented.

A method for generating a perceptual equalization (EQ) filter applicable to an audio signal to equalize the audio signal, including: generating a full EQ filter for use in performing full equalization on the signal; and modifying the frequency-amplitude spectrum of the full EQ filter in accordance with a dip detection threshold function, thereby generating the perceptual EQ filter, where the dip detection threshold function is indicative of minimum perceivable amplitude of each of at least a number of different dips in the frequency-amplitude spectrum of an acoustic signal. Also, a method for equalizing an audio signal, including: generating a full EQ filter for use in performing full equalization on the signal, modifying the frequency-amplitude spectrum of the full EQ filter in accordance with at least one dip detection threshold value, thereby generating a perceptual EQ filter, and applying the perceptual EQ filter to perceptually equalize the signal.

A sound-reproducing device has a DSP and a μCom performing a predetermined calculation to an input signal, and an AMP amplifying the calculated signal and outputting the signal to a speaker unit. The DSP and the μCom cuts a part of a reverse characteristic of a frequency characteristic of the speaker unit in a low frequency, and superimposes the reverse characteristic on the input signal. The sound-reproducing device can overcome a shortage of low sound during reproduction of low to medium volume in the speaker unit having a relatively small diameter, and can keep reproduction sound quality without loss of the reproduction sound quality during reproduction of large volume.

A microphone system, comprises a first transducer, for generating a first acoustic signal, and a second transducer, for generating a second acoustic signal. A high-pass filter receives the first signal and generates a first filtered signal, and a low-pass filter receives the second signal and generates a second filtered signal. An adder forms an output signal of the microphone system as a sum of the first filtered signal and the second filtered signal.

A circuit and method is disclosed for filtering an audio signal. The circuit has a first quadrature source and multipliers for multiplying the input signal by the I and Q outputs of the quadrature source. The multiplied inputs are then passed through a pair of low pass filters, which may have an adjustable Q factor. The outputs of the low pass filters are then multiplied in a second pair of multipliers by the I and Q outputs, respectively, of a second quadrature source, which will typically be of the same frequency, but different amplitude and phase, of the first quadrature source. The twice-multiplied signals are then summed by an adder to provide an output signal. The circuit may be modified to include a companding circuit between the low pass filters and the second pair of multipliers that determines the amplitude of the input signal, filters it, and compands the signal in a compandor. The compandor may have adjustable parameters. The circuit thus allows for far greater flexibility and control of the processing of the input signal than prior art circuits.

An adaptive music system includes at least one processing circuit operative to characterize ambient noise features of digitized ambient noise obtained from a microphone circuit associated with a user device and characterizes music features of digitized music being played through the user device to a speaker. The at least one processing circuit is further operative to generate a music playout command responsive to processing the characterized ambient noise features and the characterized music features through a machine learning model that has been trained based on a combination of historical user actions to control music playout, historically characterized ambient noise features that are correlated in time to the historical user actions, and historically characterized music features that are correlated in time to the historical user actions. The at least one processing circuit is further operative to control music playout through the user device responsive to the music playout command.

In live music performances it is desirable for a mixing console operator to be able to hear the result of all the processing of a single input signal provided by the various processing steps without the other input signals being present. This is achievable by providing a console (10) which processes an input signal independently of other input signals to produce an operator output signal (210), wherein the processing is arranged to be identical to that applied in combination to the same signal as it is processed, in combination with other signals, for the creation of an output mix (180).

A computer implemented method for managing a sound emitting device comprising: receiving data associated with operation of the sound emitting device at a predetermined location; processing said data to determine an operating characteristic of that device for that location; comparing the operating characteristic with a predetermined mathematical relationship to determine whether a difference exists; and identifying an input adjustment to correct the difference wherein the input adjustment optionally is within a predetermined range and optionally does not exceed a predetermined maximum increment; wherein the predetermined mathematical relationship is between an input variable and an output variable in respect of the sound emitting device.

Systems and methods disclosed herein include computing devices and/or computing systems configured to (i) determine portions of audio content comprising speech dialog based at least in part on metadata associated with the audio content, (ii) for individual portions of the audio content containing speech dialog, identify dialog enhancement parameters for application the portions of audio content containing speech dialog, and (iii) playing (or causing to be played) the audio content, where playing the audio content includes applying the dialog enhancement parameters to the portions of audio content containing speech dialog.

Embodiments described herein provide for smart configuration of audio settings for a playback device. According to an embodiment, while a playback device is a part of a first zone group that includes the playback device and at least one first playback device, the playback device applies a first audio setting. The embodiment also includes the playback device joining a second zone group that includes the playback device and at least one second playback device. The embodiment further includes the playback device applying a second audio setting based on an audio content profile corresponding to the second zone group.