Question

The factor that most clearly distinguishes this example from music of earlier periods is the use of: play sudden dynamic changes from very soft to very loud extended dissonance that doesn't resolve directly to consonance ostinati, which is the repetition of an underlying pattern to provide consistency and structure new timbres, created by electronically altering the sound of traditional instruments answer

Answer 1

It would be the use of Extended dissonance that doesn't resolve directly to consonance.
Because of this, if people who got used to modern music started to listen to the musics from the past period, they will tend to feel that those music lack some sort of pleasantness in its lyric.