[対策] There are 2 audio listeners in the scene. Please ensure there is always exactly one audio listener in the scene.

Unityで There are 2 audio listeners in the scene. Please ensure there is always exactly one audio listener in the scene. のようなメッセージが出る場合には複数のAudioListenerが同じsceneの中にあるかを確認し一つに減らす。

heirarchy viewでAudioListenerで検索するとAudioListenerのcomponentのチェックを外す。Audio Sourceは外さないように