Assertion: tape recorder's head | /r/HasProperty | powered
Facets:
value: electrically
type: MANNER
Source sentences:
text: The erase head is powered during recording from a high frequency source (usually the same oscillator that provides the AC bias).
text: Sound recording now became a hybrid process — sound could now be captured, amplified, filtered and balanced electronically, and the disc-cutting head was now electrically powered, but the actual recording process remained essentially mechanical – the signal was still physically inscribed into a wax 'master' disc, and consumer discs were mass-produced mechanically by stamping a metal electroform made from the wax master into a suitable substance, originally a shellac-based compound and later polyvinyl plastic.