typedef struct _ModulePDF
{
    ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
    INT32 numBins;                                // Number of bins
    INT32 controllableResetPin;                   // Controlling Reset Pin
    FLOAT32 lowerBinEdge;                         // Specifies the lowest bin in the histogram
    FLOAT32 higherBinEdge;                        // Specifies the highest bin in the histogram
    FLOAT32 smoothingTime;                        // The smoothing time of the PDF in ms
    FLOAT32 alpha;                                // Forgetting factor
    FLOAT32 binSpacing;                           // BinSpacing
    INT32 reset;                                  // Boolean parameter to reset the pdf.
    FLOAT32* binCenter;                           // indices
    FLOAT32* previousOut;                         // previous output.
    INT32* hist;                                  // init hist.
} ModulePDFClass;