As cofounder of Firesign Theater, Phil Proctor influenced several generations of comedy fans. (One of them was Steve Jobs.) Younger people may know him better as the voice of Howard Seville on The Rugrats. He’s still going strong, providing voices for video games, animated movies like Toy Story and Monsters Inc., and costarring in the YouTube comedy series, “Boomers on a Bench.” There’s nothing Phil hasn’t done in show business; he and the Firesign gang even wrote the first psychedelic rock Western, Zachariah, back in 1971. There’s no shortage of great stories when Phil starts talking to Leonard.