Over the past 20 years, trance has maintained one of the most loyal fan bases in dance music. Trance mainstay Ferry Corsten, new-school producer Ciel and more talk about the sound’s enduring appeal.

If you’ve ever cried on the dance floor, it was probably during an Above & Beyond set. Since the trio’s formation 20 years ago, Jono Grant, Tony McGuinness, and Paavo Siljamäki have brilliantly ...