public bool mute ;


Un- / Mutes the AudioSource. Mute sets the volume=0, Un-Mute restore the original volume.

// Mutes-Unmutes the sound from this object each time the user presses space.
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { AudioSource audio;

void Start() { audio = GetComponent<AudioSource>(); }

void Update() { if (Input.GetKeyDown(KeyCode.Space)) if (audio.mute) audio.mute = false; else audio.mute = true; } }