Stand-up comic Marc Maron has been doing his highly successful podcast WTF from his Los Angeles garage since 2009. The format is usually an hour-long, one-on-one conversation, and his guests usually are drawn from the comedy world. In February of 2012, however, Maron featured pop genius Nick Lowe as his guest; in subsequent months, more musicians followed, including Jack White, Wayne Coyne of The Flaming Lips, Carrie Brownstein of Wild Flag and Sleater-Kinney, James Mercer of The Shins, and Craig Finn of The Hold Steady. This week, he posted his interview with Fiona Apple. Here, Maron discusses what’s behind this increase in musician guests, and how he approaches these episodes differently.