IIRFilterNode
The IIRFilterNode interface of the Web Audio API is a AudioNode processor which implements a general infinite impulse response (IIR) filter; this type of filter can be used to implement tone control devices and graphic equalizers as well.
Properties
The channelCount property of the AudioNode interface represents an integer used to determine how many channels are used when up-mixing and down-mixing connections to any inputs to the node.
The channelCountMode property of the AudioNode interface represents an enumerated value describing the way channels must be matched between the node's inputs and outputs.
The channelInterpretation property of the AudioNode interface represents an enumerated value describing how input channels are mapped to output channels when the number of inputs/outputs is different.
The read-only context property of the the node is participating in.
The numberOfInputs property of the AudioNode interface returns the number of inputs feeding the node.
The numberOfOutputs property of the AudioNode interface returns the number of outputs coming out of the node.
Functions
The connect() method of the AudioNode interface lets you connect one of the node's outputs to a target, which may be either another AudioNode (thereby directing the sound data to the specified node) or an change the value of that parameter over time.
The disconnect() method of the AudioNode interface lets you disconnect one or more nodes from the node on which the method is called.
The getFrequencyResponse() method of the IIRFilterNode interface takes the current filtering algorithm's settings and calculates the frequency response for frequencies specified in a specified array of frequencies.