VCP Challenge #61 Equinox

The actual bit related to the equinox is the low drone (need good bass speakers to hear them) at 366 / 6 = 61 Hz, offset in amplitude by 1/6 Hz so that there is two times a year (the equinox) where night and day are the same length. The drone is further frequency modulated slightly by a lunar frequency at 27.35 / 6 Hz and volume modulated over the entire length of the song at 366 / 2 = 183 seconds.