You needed engineers to maintain, calibrate, tune, and operate the equipment which was retro ee components, instruments that are used for decades. But as thingb

You needed engineers to maintain, calibrate, tune, and operate the equipment which was retro ee components, instruments that are used for decades. But as thingbs got more reliable, solid state, software emulation, hard drives instead of magnetic tape, you don’t need that ee knowledge to get a song made.