DrawStringWithArray

    public static void DrawStringArraywithAudio(SerializedProperty messages, SerializedProperty audioClips, string label)
    {
        GUILayout.BeginVertical("box");
        EditorGUILayout.LabelField(label);

        for (int i = 0; i < messages.arraySize; i++)
        {
            SerializedProperty members = messages.GetArrayElementAtIndex(i);
            SerializedProperty audioMember = audioClips.GetArrayElementAtIndex(i); //add audio member

            GUILayout.BeginVertical("box");
            GUILayout.BeginHorizontal();
            EditorGUILayout.PropertyField(members, new GUIContent("Message " + (i + 1))); //new GUIContent("Message " + (i + 1))
                                                                                          //draw remove button
            if (GUILayout.Button("X", GUILayout.Width(20)))
            {
                messages.DeleteArrayElementAtIndex(i);
            }
            GUILayout.EndHorizontal();


            if (audioMember != null)
            {
                EditorGUILayout.PropertyField(audioMember, new GUIContent("Audioclip " + (i + 1))); //new GUIContent("Message " + (i + 1))
            }

            GUILayout.EndVertical();
        }

        if (GUILayout.Button("Add message"))
        {
            messages.InsertArrayElementAtIndex(messages.arraySize);
            audioClips.InsertArrayElementAtIndex(messages.arraySize);
        }
        GUILayout.EndVertical();
    }