Builds a data structure that contains precalculated double-precision data for use by multichannel cascaded biquad IIR filter functions.
- iOS 8.0+
- macOS 10.10+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
Array of double-precision real coefficients. Its length should be 5 times the number of sections in the biquad filter.
The number of sections in the biquad filter. The same number of sections is used for each channel, so only one value is specified.
The number of input/output channels.
Pointer to an allocated and initialized struct of type