reson~ Reference

Name	Type	Opt	Description
initial-gain center-frequency and Q	int or float	opt	Numbers set the initial gain, center frequency, and Q. The default values are 0 for gain, 0 for center frequency, and 0.01 for Q.

Messages

int	initial-gain/center-frequency/Q [int]	An int or float can be sent in the three right inlets to change the filter-gain, center-frequency, and Q. If a signal is connected to one of the inlets, a number received in that inlet is ignored.
float	initial-gain/center-frequency/Q [float]	An int or float can be sent in the three right inlets to change the filter-gain, center-frequency, and Q. If a signal is connected to one of the inlets, a number received in that inlet is ignored.
list	initial-gain center-frequency and Q [list]	The first number sets the filter-gain. The second number sets the filter center-frequency. The third number sets the filter-Q. If any of the inlets corresponding to these parameters have signals connected, the corresponding value in the list is ignored.
clear		Clears the filter's memory. Since reson~ is a recursive filter, this message may be necessary to recover from blowups.
signal		In left inlet: Any signal to be filtered. In left-middle inlet: Sets the bandpass filter gain. This value should generally be less than 1. In right-middle inlet: Sets the bandpass filter center frequency in hertz. In right inlet: Sets the bandpass filter "Q"-roughly, the sharpness of the filter - where Q is defined by the center-frequency divided by the filter-bandwidth. Useful Q values are typically between 0.01 and 500.