why is the audio not playing on my video player?

ok ive never used the video player before managed to get it running on android and the editor but the audio will not play, im getting the video from a url and pointing the video player towards an audio source attached to the same object as the video player component is attached, ive followed advice from t$$anonymous$$s link https://stackoverflow.com/questions/41144054/using-new-unity-videoplayer-and-videoclip-api-to-play-video but havent had any joy yet below is the order of how im calling it as mentioned it works but the audio doesnt, can anyone help

 private AudioSource audio;
 private VideoPlayer screen;
 
     screen = go.GetComponentInC$$anonymous$$ldren<VideoPlayer>();
     audio = go.GetComponentInC$$anonymous$$ldren<AudioSource>();
     audio.playOnAwake = false;
     screen.source = VideoSource.Url;
     screen.url = videoObj.VideoURL;
     screen.audioOutputMode = VideoAudioOutputMode.AudioSource;
     screen.EnableAudioTrack (0,true);
     screen.SetTargetAudioSource (0,audio);
     screen.Prepare ();
     screen.Play();
     audio.Play ();