Volume of original signal to pass to output. 0.0 to 1.0. Default = 0.5.

	// Dont mix the original sound with the filter, only use the processed output
	@script RequireComponent(AudioSource)
	@script RequireComponent(AudioChorusFilter)
	function Start() {
		GetComponent(AudioChorusFilter).dryMix = 0;
	}

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(AudioSource))]
[RequireComponent(typeof(AudioChorusFilter))]
public class Example : MonoBehaviour {
    void Start() {
        GetComponent<AudioChorusFilter>().dryMix = 0;
    }
}

import UnityEngine
import System.Collections

[RequireComponent(typeof(AudioSource))]
[RequireComponent(typeof(AudioChorusFilter))]
public class Example(MonoBehaviour):

	def Start() as void:
		GetComponent[of AudioChorusFilter]().dryMix = 0