I can't hear any Airplanes flying over since a while now,which is nice if the construction sites around here would stop their hammering it would be fantastic... Just don't get used to certain things of which one is intrusive noise...I use headphones when I work so I keep the world out at least for the duration it takes to chose tracks,do the volume limiting and the downmix.Depending on the style and technique used this can be anything from ten minutes to two hours.This one here took about forty minutes...