Separate setting music volume and sfx in one scene

Here is my script that attached to the UI button, on touch enables/disables music. I'd like to add another button, that will on touch turn on/off sfx and only sfx, independently from music.

I don't know how to do it, if someone could me explain it or show a code, it would be awesome :)

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 
 
 public class MusicOnOff : MonoBehaviour {
 
     Text Sound;
     
     public bool CanMute = false;
     public static bool pauza = false;
 
     public static int level1;
     
 
         
     void Start () {
 
         level1 = PlayerPrefs.GetInt("level1", -1); 
 
         if (pauza)
             AudioListener.pause = true;
         else
             AudioListener.pause = false;
 
 
         Sound = GameObject.Find ("Sound").GetComponent<Text> ();
     
     }
 
     void Update () {
 
 
         if (level1 < 0) {
             Sound.text = ("Touch to turn off music");
             AudioListener.pause = false;
             pauza = false;
         }
          else if (level1 > 0) {
             Sound.text = ("Touch to turn on music");
             pauza = true;
             AudioListener.pause = true;
 
     
         }}
 
 
     public void OnTouch1(){
         
 
         if (!pauza) {
 
             AudioListener.pause = true;
             CanMute =  true;
             
             level1 += 2;
             
             PlayerPrefs.SetInt ("level1", level1);
             
             
         } else if (pauza) {
 
             AudioListener.pause = false;
             CanMute = false;
             
             level1 -= 2;
             
             PlayerPrefs.SetInt ("level1", level1);
         }
     }
 }