Abstract: A system for communication among audio-related devices in an audio system includes a performance equipment manager that communicates with audio-related devices to monitor and control changeable parameters of a corresponding audio-related device. Each of the audio-related devices includes an audio node structure having components that are representative of the functionality of the respective audio-related device. Some of the components are representative of changeable parameters in the audio-related device. The performance equipment manager is configured to be selectively subscribed to one or more of the changeable parameters so that when a predefined condition occurs, the audio-related device is configured to automatically provide the current value of the changeable parameter(s) to the performance equipment manager.

Abstract: A system for management and control of audio-related equipment. A link manager may be included in the system. The link manager may be configured to manage subscriptions to multiple other audio-related devices or control panel views. When the managed data variables change, the link manager module may notify other audio-related devices and/or control panel views of the change. In response to the notification, the other audio-related devices and/or control panels may subscribe to the audio-related device with the changed data variable, to request receipt of the updated data variable. In some examples, the link manager module may also be configured to lessen the subscription burden for a particular audio-related device.

Abstract: A system may instantiate a control panel view that is useable to monitor and control an audio-related device operable in an audio system. A product plugin that corresponds to an audio-related device may receive and analyze the components of an audio node structure received from the audio-related device. The product plugin is configured to store one or more predefined control panel views that are associated with one or more of the components. The product plugin is also configured to instantiate the predefined control panel views that correspond to the components. If the product plugin determines that all of the components are not represented, one or more user interface aspects can be integrated into one or more of the control panel views prior to instantiation. Alternatively, a generic control panel view can be generated.

Abstract: A system for determination of the functionality of an audio-related device that is operable in an audio system includes a performance equipment manager. The performance equipment manager may receive from an audio-related device an audio node structure representative of the corresponding audio-related device. The received audio node structure may be reviewed to determine if all the components included in the audio node structure are predefined within the performance equipment manager. For those components that are known, no discovery is necessary and actual values of changeable parameters in the audio-related device may be obtained. For unknown components of the audio node structure, the performance equipment manager may undertake discovery to identify additional portions of the audio node structure, and/or attributes related to the unknown components, in order to obtain actual values of changeable parameters related to the unknown components.

Abstract: Systems and methods for ambient noise compensation are disclosed. One example of a system includes a variable amplifier, a source sound processor, an area sound processor, and an adjustment circuit. The variable amplifier adjusts an audio input signal to generate an audio output signal with an appropriate level so that the audio output signal is audible over noise in a listening area. The source sound processor and the area sound processor may split the audio output signal and a monitoring signal into frequency bands, and may compare these signals band-by band to find differences that represent time-varying noise in the monitoring signal. These differences may be modified to account for the acoustic response of the listening area and for constant-level background noise in the listening area. The adjustment circuit controls the variable amplifier in response to these differences.

Abstract: This invention is an audio system capable of identifying frequencies of feedback signals and filters these feedback signals. Frequency interpolation is utilized on a sampled frequency spectrum signal corresponding to a feedback signal, where the frequency interpolation allows the frequency of the feedback signal to be identified, especially where the frequency lies between samples of the frequency spectrum signal. The frequency identification allows a less intrusive filter, such as a notch filter, to be placed at the determined frequency of the feedback to eliminate the feedback signal. The placement of the notch filter reduces the effect on the audio signal provided by the audio system. The audio system may provide adaptive filtering of multiple feedback signals, using a single filter such as a notch filter.

Abstract: A method and apparatus for combining analog and digital processing techniques to thereby capture a much wider dynamic range of an original input signal than an A/D converter can by itself, to thereby preserve a maximum amount of information from the original input signal, wherein a processing amplifier combines a level-dependent, soft logarithmic limiting function with a high-frequency pre-emphasis filter, such that the pre-emphasis helps to compensate for a disproportionate reduction of high frequency information when portions of the signal are in an overload region, and wherein digital de-emphasis of the digitized signal enables recovery of the dynamic range that was sacrificed to create the overload region.