Set the center frequency in the Freq (Hz) field or by dragging the arrows. For examples and details, see Filters Example.
To have external control over Q from the block, refer to the State-Variable (Q input) Filter.
To have external control over Q and F from the block, refer to the State-Variable (Q/F input) Filter.
The three output pins let you choose among LP, HP, BP filters. The nature of this algorithm is to compute the coefficients for all filter types, giving you access to all of the filters simultaneously.