Assertion: pop music | /r/CapableOf | found less variety
Facets:
value: in pitch progressions
type: TEMPORAL
value: since the 1960s
type: TEMPORAL
Source sentences:
text: In 2016, a Scientific Reports study that examined over 464,000 recordings of popular music recorded between 1955 and 2010 found that since the 1960s, pop music had found less variety in pitch progressions, grown average loudness levels, less diverse instrumentation and recording techniques, and less timbral variety.