typedef struct _ModuleSampleRate
{
    ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
    FLOAT32 procSpeed;                            // Processor clock speed in MHz
    INT32 numBlocksToAverage;                     // Number of blocks to process before the sample rate is retured
    INT32 lastCount;                              // Holds the last call cycle count
    INT32 averageDeltaCount;                      // Holds the average delta count of numBlocksToAverage calls
    INT32 SRArrayLength;                          // Number of sample rates that can be estimated
    INT32 initialized;                            // Specifies whether the last cycle counter has been initialized
    INT32 dataValid;                              // Indicates whether the sample rate measurement is valid
    FLOAT32 measuredSR;                           // Readback variable. Displays the measured sample rate on the inspector
    FLOAT32 prevMeasuredSR;                       // Last measured sample rate
    FLOAT32 prevPrevMeasuredSR;                   // Previous to last measured sample rate
    INT32 SROutPin;                               // Boolean specifies whether module will have output pin
    INT32 blockCounter;                           // Counts up to numBlocksToAverage
    FLOAT32* allowableSR;                         // Array of possible sample rates
} ModuleSampleRateClass;

 M=measure_sample_rate_module(NAME, SRARRAYLEN, SROUTPIN)
 Creates a sample rate measure module for use with the Audio
 Weaver.  Arguments:
     NAME - name of the module.
     SRARRAYLEN - Array length of the allowable sample rates
     SROUTPIN - Boolean which specifies whether module outputs detected 
                sample rate that can be used as the input to sample rate
                switch module