typedef struct _ModuleThreeBandToneControl
{
    ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
    FLOAT32 smoothingTime;                        // Time constant of the smoothing process.
    FLOAT32 lowFreq;                              // Low band center frequency, in Hz.
    FLOAT32 midFreq;                              // Mid band center frequency, in Hz.
    FLOAT32 highFreq;                             // High band center frequency, in Hz.
    FLOAT32 lowGain;                              // Low band gain, in dB.
    FLOAT32 midGain;                              // Mid band gain, in dB.
    FLOAT32 highGain;                             // High band gain, in dB.
    INT32 filterUpdateActive;                     // Boolean that is set when updating coefficients.
    FLOAT32 smoothingCoeff;                       // Smoothing coefficient for the filter coefficients.
    FLOAT32 midTargetGain;                        // Target gain of the mid frequency gain.
    FLOAT32 midCurrentGain;                       // Current gain of the mid frequency gain.
    FLOAT32 midSmoothingCoeff;                    // Sample-by-sample smoothing coefficient of the mid frequency gain.
    FLOAT32* lowerTargetCoeffs;                   // Target coefficients for the low frequency shelf.
    FLOAT32* lowerCurrentCoeffs;                  // Current coefficients for the low frequency shelf.
    FLOAT32* lowerState;                          // State variables for the low frequency shelf.
    FLOAT32* upperTargetCoeffs;                   // Target coefficients for the high frequency shelf.
    FLOAT32* upperCurrentCoeffs;                  // Current coefficients for the high frequency shelf.
    FLOAT32* upperState;                          // State variables for the high frequency shelf.
} ModuleThreeBandToneControlClass;