 Virtually all genres of pop Daerah are dependent on the cassette medium for their audience.Some Pop Daerah genres are little more than cassette-company experiments, generating only a few performers and a handful of tapes, but others are firmly established, with many performers and steady production.Four genres—-"Pop Batak," "Pop Minang," "Pop Sunda," and "Pop Jawa"—-are especially solid.