What was the most popular way of listening to music in the 1970s?

It seems that Roland Orzabal writes most of the songs and sings most of them What does Curt do if anything? What job gorbachev doing now? What is the speed in which a movement is performed? How do you play we wish you a merry Christmas on violin? How do you know what year my washburn lyon and healy piano was made? What was the last song that Cliff Burton played with Metallica? Is sound a diffrient way to say song? What television show was Somewhere Over the Rainbow by israel kamakawiwo'ole featured? Who is the father of Jessica Simpsons baby? Why are women's volleyball shorts so short? How old was Matt dillons horse Buck when gunsmoke series began? Does Joseph cotten have children? Is Martin and Chris Kratt married? What is folk nation made up of? Tulisa engaged but still acting like a single gal? Who has sold more albums Barry Manilow or Lionel Richie? When does harry styles come to Egypt? What instruments do you associate with reggae music? Where is Jordin sparks ticklish? Is downloading music with soulseek legal?

What was the most popular way of listening to music in the 1970s?