FMOD Channels in Unity

So I'm trying to create a Master Volume using FMOD in Unity. My initial thought was to use a channel however in the unity plugin version Im not seeing Channels that I can use. I looked around and im thinking that mixerstrips might do the trick im looking for but when I try to use it I get errors regarding unable to find the event sounds. any help would be appreciated.

 public FMOD.Studio.MixerStrip masterBus;
 public FMOD.Studio.System sys;

 public void Start()
     {  
         FMOD.GUID guid;
         sys = FMOD_StudioSystem.instance.System;
         FMOD_StudioSystem.ERRCHECK(sys.lookupEventID("/", out guid));
         FMOD_StudioSystem.ERRCHECK(sys.getMixerStrip(guid, FMOD.Studio.LOADING_MODE.BEGIN_NOW, out masterBus));
     }