The design of the level transition machine is supposed to resemble a magnetron or a commutator. It creates an electromagnetic field and hovers over the surface. To convey the design more accurately, I started experimenting with sound. Here is the Metasound for this object.
When the player is close enough to the machine, they will hear a slow humming. To achieve this, I recorded my voice humming very low, layered it three times, and slightly shifted each track. When the player activates the level transition, the frequency and volume of the humming increase, creating the impression of a large rotating electrical device.