The 9670 audio automatic gain/loudness control and 9690 audio compliance/monitoring software is adjusts overall level of signal. The LevelTrack audio AGC option adds a user configurable audio level management system to Avenue signal processing modules. LevelTrack will correct mismatched audio levels between different program sources or segments within a program. Errors of this type are regrettably common due to inconsistencies between different providers and program elements. VU and 1770 loudness algorithms LevelTrack provides two different approaches for adjusting audio levels VU algorithms and the ITU-R1770 loudness algorithm. Using VU algorithms, audio levels are weighted with VU metering and measured in dBfs. The VU approach is particularly useful when calibrating and aligning equipment because it is a frequency independent method. Alternately, LevelTrack allows to run audio against a 1770 LKFS target range. These loudness measurements and adjustments conform to the ITU-R1770 specification. Loudness is frequency dependent and is weighed based upon case studies that reveal how humans perceive sound and loudness. User control is provided over the parameters for minimum and maximum signal targets, maximum gain and attenuation, attack time and transition time. This flexibility allows the operator to customize LevelTrack to suit the specific audio level challenges in a particular installation. All of these parameters can be adjusted through the Avenue control system. LevelTrack will automatically monitor the levels in up to 8 audio channels. Based upon the history in each channel, gradual changes are applied to prevent the audio level from dropping below or exceeding user programmable thresholds. This automatic level control can be applied on an individual channel or stereo pair basis. By adjusting the overall level of the signal, rather than masking the errors with compression, LevelTrack does not upset the internal dynamics of the program material. LevelTrack operates downstream of the manual audio level adjustments that are already provided in Avenue modules. This allows the automatic feature to assist the operator when needed, without needing to be enabled or disabled.