Builds a data structure that contains precalculated data for use by double-precision cascaded biquad IIR filter functions.
- iOS 6.0+
- macOS 10.9+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
Input array of double-precision filter coefficients. Its length should be 5 times the number of sections in the biquad filter.
Number of sections in the biquad filter.
Pointer to the setup object, of type