Rock in Opposition (RIO) is a type of music that started in the 1970s. It is a kind of rock music that is very complex and interesting to listen to. RIO was started by some musicians who didn't like the normal kind of rock music that was popular at the time. They wanted to make music that was different and more experimental.
RIO is called "opposition" because it is different from the normal rock music that most people like. It can be hard to understand at first, but if you listen carefully, you can hear many different sounds and instruments working together to create a very unique sound.
One of the key things about RIO is that it is not tied to a specific genre or style. Musicians who play RIO music may use instruments that are not commonly used in rock music. They might also use special techniques to create unusual sounds.
RIO music can be very challenging for listeners because it is often complicated and requires a lot of attention. But many people who love RIO feel that it is a very rewarding kind of music to listen to. They enjoy the way that different sounds and instruments are mixed together to create something that is truly unique.
Overall, RIO is a kind of rock music that is very different from most of the rock music that you might be used to. It is a type of music that requires a lot of attention and careful listening, but it can be very rewarding for people who love complex and interesting music.