the.com/waveform
the shape sound makes when you finally give it a graph instead of an ear.
means a visual representation of a signal's amplitude changing over time, whether that signal is sound, light, or electricity.
from from wave plus form, formalized in 19th century physics as oscilloscopes and later audio engineers needed to literally see vibrations instead of just hearing them.
square vs sinesame pitch, wildly different texture and harshness
oscilloscope debut1897, made invisible signals suddenly visible
digital audiojust thousands of tiny amplitude snapshots per second