When we started with RoomPerfect, one of the many changes (one of the patents) was to develop our own room measurement signal. So no short sweeps. We use a rather long low frequency measurement signal followed by a rather long high frequency measurement signal. The reason behind this, is that we want to exite the room and the acoustical problems. That happens with these long measurement signals. A nice side effect is that RoomPerfect is easily thrown off by disturbances: a door opens, someone talks or your pen drops. It’s not in the measurement signal! It’s not in the correction curve. That’s another nice side effect as well. We get better quality data and it’s less subject to disturbances. But of course it takes a while. Imagine that you have 5, 7 or 9 speakers, it will take a while. Luckily you only have to do it once.