> Regardless of a grid’s size, the current flowing through it oscillates in perfect synchrony, at exactly the same frequency, throughout the whole grid I have

> Regardless of a grid’s size, the current flowing through it oscillates in perfect synchrony, at exactly the same frequency, throughout the whole grid I have a feeling that this is not exactly true. The grid is composed of transmission lines (in the “wires on pylons sense”), that are on one hand short enough that they do not really behave like transmission lines (in the circuit analysis sense), but on the other hand long enough that their propagation delay and other “RF-like” properties are somewhat interesting for design of efficient grid. On the other hand, the phase shifts and related distortion effects are outside of the bandwidth of the audio recording as long as the grid is at least somewhat properly designed.