Assertion: disc's groove | /r/CapableOf | guide the stylus
Facets:
Source sentences:
text: In the spring of 1877 another inventor, Charles Cros, suggested that the process could be reversed by using photoengraving to convert the traced line into a groove that would guide the stylus, causing the original stylus vibrations to be recreated, passed on to the linked diaphragm, and sent back into the air as sound.