Assertion: disc's sound | /r/HasProperty | played
Facets:
value: back from the etched cylinder
type: OTHER
value: by tracing the stylus
type: MANNER
Source sentences:
text: The sound could be played back by tracing the stylus along the recorded groove and acoustically coupling its resulting vibrations to the surrounding air through the diaphragm and a so-called "amplifying" horn.
text: The sound could then be played back from the etched cylinder as a needle went along the groove and reversed the process, making the diaphragm vibrate, recreating the original sound.