The Ensemble is a very ordinary, predictable thing. There's a series of frequencies, corresponding to the real numbers, and each frequency operates by its own internal rules dictated by its numerical structure, and they don't interfere with each other, and if you're here, you already know that that's a lie.
The Ensemble appears to be an ordinary, predictable thing, because we keep it looking ordinary and predictable. Our current frequency, for example, is not actually in the Ensemble; you'd maybe think of us being at -i, but it's best to throw out your preconceptions about how any of this works. -i looks like it's a frequency at all because it has an incredibly watertight reliquary; other interferences might not, and if we're lucky we're the ones who can make them. -i's reliquary is solid enough, in fact, that we've made it our base of operations.
Being an interference, -i has some very nice properties. Interferences on the Ensemble's primary chord don't affect it, because it's far away from all of that, so we can avoid the incredibly arduous process of building a reliquary for an interference from the inside. It has very little in the way of native physics or life, and the way it behaves can be shaped entirely by its reliquary. We've designed it to be habitable, with a constant uninterrupted supply of power and air and geometry and additional office space, in a way much easier than finding the exact real frequency of an infinite office building and then switching frequencies if we ever want to change the thermostat.
Now, if you'll follow me, you'll see...