Obviously the sound-system there is fucking amazing. The monitoring is superb, the main sound is very loud but not too hard on the ears so it's very easy to enjoy without leaving the place with your ears ringing (unless you are mental and enjoy standing next to the speakers). That said there are a few things which do shape your set in the Cathedral: first of all it's a concrete hall, which means there's reverb, which means that if you play too fast the reverb covers too much of the silence - and you need silence. I'm not referring to the break-time-silence, but to the quieter parts of tracks which happen between the booming kicks. The ups and downs are pleasing to us, whether it's on a bigger or a smaller scale, so if you play too fast in an environment like that - you risk losing your dynamics to reverb. I started off at 137 with a plan to speed up, but ended up staying on the same BPM for this very reason. Also, Funktion 1 is a very special kind of sound-system and it is probably the best one for music with minimalist approach (ie. music that doesn't have too many elements). When it comes to music with a lot going on it can get a bit mushy and, while even that sounds better than on most sound-systems - you kinda want to get the max out of what you're playing on. With this in mind it's always better to play something like Norman Nodge - NN 8.0, or Steve Stoll - No Questions Please than to go for Joey Beltram - It Works, Jeff Mills - UFO or something noisy like that.