LowPassFilter = function(audiolet, frequency) {
    BiquadFilter.call(this, audiolet, frequency);
}
Low-pass filter

**Inputs**

- Audio
- Filter frequency

**Outputs**

- Filtered audio

**Parameters**

- frequency The filter frequency.  Linked to input 1.

@constructor
@extends BiquadFilter
@param {Audiolet} audiolet The audiolet object.
@param {Number} frequency The initial frequency.