(1) amplitude modulation ::
amplitudo crebritate modulorum suaviorem(2) frequency modulation ::
frequency modulatio(3) pulse width modulation ::
width pulsus crebritate modulorum suaviorem(4) phase modulation ::
tempus crebritate modulorum suaviorem(5) pulse code modulation ::
codice pulsus crebritate modulorum suaviorem(6) zero modulation ::
nulla crebritate modulorum suaviorem