Much of the technology of Strata Varia involves the use of tuning crystals that respond to specific notes sung by the operator. All humans have perfect pitch, so it is a matter of course to sing doors open and closed, give instructions to an automaton or vehicle in a series of quick, sharp notes, etc.
Life in the setting would seem to us to be a hodgepodge of high and low tech solutions to everyday requirements. Manual labor is common, building one’s own home by hand out of stone or wood is considered normal on most steads. But buildings of metal or formed concrete are also not unusual.