An audio system comprising: an audio-related device that includes a three tier hierarchical audio node structure indicative of the functionality of the audio-related device, wherein the hierarchical audio node structure includes components comprising virtual devices (404, 406) in a first tier, objects representing at least one of processing blocks, control elements and status elements in a second tier, and state variables being data variables that may be varied within the virtual device (404, 406) or objects in a third tier wherein the hierarchical audio node structure is representative of changeable parameters, which comprise the state variables, in the audio-related device, and wherein the virtual devices (404, 406) include the objects and wherein the virtual devices (404, 406) and objects include the state variables; and a performance equipment manager configured to communicate with the audio-related device and provide a user interface to monitor and control the changeable parameters of the audio-related device, where the performance equipment manager is further configured to generate and transmit a subscribe message to the audio-related device, the subscribe message comprising specification of one or more of the changeable parameters and a request to receive a value of the specified one or more changeable parameters upon a change in the value; where the audio-related device is configured to subscribe the performance equipment manager to only the one or more of the changeable parameters in the audio-related device included in the subscribe message so that when the value of any one of the one or more changeable parameters changes, the audio-related device provides the changed value to the performance equipment manager; characterized in that the audio-related device is a plurality of audio related devices, each of which includes a venue table that comprises a plurality of groups of stored changeable parameters representing settings specific to the respective one of the audio-related devices in which the venue table is included, each group of settings associated with one of a plurality of respective venue setting group identifiers, the respective venue setting group identifiers being common venue setting identifiers for all of the plurality of audio-related devices, and where the performance equipment manager transmits one of the respective venue setting group identifiers to direct all of the audio-related devices to each select and implement a corresponding one of the groups of settings from the venue table based on a user selected operation of the audio system. an audio-related device that includes a three tier hierarchical audio node structure indicative of the functionality of the audio-related device, wherein the hierarchical audio node structure includes components comprising virtual devices (404, 406) in a first tier, objects representing at least one of processing blocks, control elements and status elements in a second tier, and state variables being data variables that may be varied within the virtual device (404, 406) or objects in a third tier wherein the hierarchical audio node structure is representative of changeable parameters, which comprise the state variables, in the audio-related device, and wherein the virtual devices (404, 406) include the objects and wherein the virtual devices (404, 406) and objects include the state variables; and a performance equipment manager configured to communicate with the audio-related device and provide a user interface to monitor and control the changeable parameters of the audio-related device, where the performance equipment manager is further configured to generate and transmit a subscribe message to the audio-related device, the subscribe message comprising specification of one or more of the changeable parameters and a request to receive a value of the specified one or more changeable parameters upon a change in the value; where the audio-related device is configured to subscribe the performance equipment manager to only the one or more of the changeable parameters in the audio-related device included in the subscribe message so that when the value of any one of the one or more changeable parameters changes, the audio-related device provides the changed value to the performance equipment manager; characterized in that the audio-related device is a plurality of audio related devices, each of which includes a venue table that comprises a plurality of groups of stored changeable parameters representing settings specific to the respective one of the audio-related devices in which the venue table is included, each group of settings associated with one of a plurality of respective venue setting group identifiers, the respective venue setting group identifiers being common venue setting identifiers for all of the plurality of audio-related devices, and where the performance equipment manager transmits one of the respective venue setting group identifiers to direct all of the audio-related devices to each select and implement a corresponding one of the groups of settings from the venue table based on a user selected operation of the audio system.