Concept
The album era was a period in English-language popular music from the mid-1960s to the mid-2000s in which the album was the dominant form of recorded music expression and consumption. It was primarily driven by three successive music recording formats: the 331⁄3 rpm long-playing record (LP), the cassette tape, and the compact disc (CD). Rock musicians from the US and the UK were often at the forefront of the era, which is sometimes called the album-rock era in reference to their sphere of influence and activity. The term "album era" is also used to refer to the marketing and aesthetic period surrounding a recording artist's album release. LP albums developed in the early 20th century and were originally marketed for classical music and wealthier adult consumers. However, singles still dominated the music industry, eventually through the success of rock and roll performers in the 1950s, when the LP format was utilized more for soundtrack, jazz, and some pop recordings. It was not until the mid-1960s, when the Beatles began to release artistically ambitious and top-selling LPs, that more rock and pop acts followed suit and the industry embraced albums to immense success while burgeoning rock criticism validated their cultural value. By the next decade, the LP had emerged as a fundamental artistic unit and a widely popular item with young people, often marketed using the idea of a concept album, which was employed especially by progressive musicians in both rock and soul. At the end of the 1970s, LP albums experienced a decline in sales while the singles format was reemphasized by the developments of punk rock, disco, and MTV's music video programming. The record industry combatted this trend by gradually displacing LPs with CDs, releasing fewer singles that were hits to force sales of their accompanying albums, and inflating the prices of CD albums over the next two decades, when their production proliferated.
