AllMusic was launched as "All Music Guide" by Michael Erlewine, a "compulsive archivist, noted astrologer, Buddhist scholar and musician". He became interested in using computers for his astrological work in the mid-1970s and founded a software company, Matrix, in 1977. In the early 1990s, as CDs replaced vinyl as the dominant format for recorded music, Erlewine purchased what he thought was a CD of early recordings by Little Richard. After buying it he discovered it was a "flaccid latter-day rehash". Frustrated with the labeling, he researched using metadata to create a music guide. In 1990, in Big Rapids, Michigan, he founded All Music Guide with a goal to create an open access database that included every recording "since Enrico Caruso gave the industry its first big boost".