Context: Hard rock is a form of loud, aggressive rock music. The electric guitar is often emphasised, used with distortion and other effects, both as a rhythm instrument using repetitive riffs with a varying degree of complexity, and as a solo lead instrument. Drumming characteristically focuses on driving rhythms, strong bass drum and a backbeat on snare, sometimes using cymbals for emphasis. The bass guitar works in conjunction with the drums, occasionally playing riffs, but usually providing a backing for the rhythm and lead guitars. Vocals are often growling, raspy, or involve screaming or wailing, sometimes in a high range, or even falsetto voice.

Question: What instrument is usually at the center of a hard rock sound?
Answer: The electric guitar

Question: Rhythm guitar in hard rock usually plays what?
Answer: repetitive riffs with a varying degree of complexity

Question: In hard rock, an electric guitar can also be used for what?
Answer: a solo lead instrument

Question: What carries the backbeat in hard rock drumming?
Answer: snare

Question: What instrument works in tandem with the drums to provide hard rock rhythms?
Answer: The bass guitar

Question: What instrument is often used in soft rock music?
Answer: Unanswerable

Question: What is played to keep the music from becoming repetitive?
Answer: Unanswerable

Question: Which bass drum is used to drive rhythms?
Answer: Unanswerable

Question: What instrument is used without the drums for hard rock rhythms?
Answer: Unanswerable

Question: What do the vocals of rock songs try to avoid?
Answer: Unanswerable