The business of music companies is the music industry. They help artists record music and they produce and market their new album and get them perform it live.
Most of the music industry labels are specialised in genres and produce rock, pop, rap or world music artists. Apart from a few local companies, the domestic market also hosts international giants such as EMI, Universal and Sony Music. A handful of companies have a different business altogether: they sell and repair pianos, guitars, music systems, speakers, etc.