UseOpenVC 

Namespace: SynicSugar.RTC

public bool UseOpenVC;

Description 

Switch OpenVC and PushToTalk.
This is valid only before matching. If we want to switch that after matching, call ToggleLocalUserSending() by ourself.

using SynicSugar.RTC;
using UnityEngine;

public class VCSample : MonoBehaviour {
    void Start(){
        //Push to Talk
        RTCManager.Instance.UseOpenVC = false;
    }
}