Perhaps the most jarring segue in Dallas radio is at 4 a.m. on Sundays, when extreme metal gives way to gospel music. What makes KNON work so well is that it has no use for mainstream or pop music, even if some of the artists that various shows play are household names. Each show has a particular focus, whether it's zydeco, Jewish music, '60s psychedelia, hard country, rockabilly or blues. What that results in is volunteer DJs who are extraordinarily passionate and knowledgeable about their respective genres — the narrower the niche, the better. And then, counter to this notion but equally enjoyable are the station's new weekday Morning Blend shows from 7 to 9. Each day, it's like a different host puts KNON's weekly programming on shuffle. You'll hear folk, blues, country, rock, reggae, metal, cumbia and more, all in the span of a couple hours, like a JACK-FM with better taste.