Last night around 23:15 I went for level 2 of the sounds. I was at my mother's house. First I tried it in my own room, but there was one sound which was very dominant and prevented me from hearing other, more subtle sounds. I tried another room and there the sounds were a bit more balanced. I managed to focus on 2 constant sounds simultaneously as well as 2 non constant sounds (e.g. the neighbours talking). Those were the only sounds around me as far as I could tell. I say simultaneously, but sometimes it felt more like I was paying attention to the individual sounds for a split second, one after another, instead of all at the same time.