Matt Dike, mercurial co-founder of rap label Delicious Vinyl and collaborator on Beastie Boys' 'Paul's Boutique'

Though he was deliberately not a household name, the music that the producer and DJ Matt Dike created, sampled and spun helped define underground Los Angeles in the 1980s.

Dike, whose death was announced on Tuesday via the label he co-founded, Delicious Vinyl, produced or co-produced some of the...