Pop culture is full of fictional bands singing songs purpose-made to capture a moment, a sound. This music doesn’t organically emerge from a scene or genre, hoping to find an audience. Instead it fulfills an assignment: it needs to be 1960s folk music, 1970s guitar rock, 80s hair metal, 90s gangsta rap, and on and on. In this episode, we’re going to use ‘Stereophonic,’ which just opened on Broadway, as a kind of case study in how to construct songs like this. The playwright David Adjmi and his collaborator, Will Butler formerly of the band Arcade Fire, will walk us through how they did it. How they made music that needs to capture the past, but wants to speak to the present; that has to work dramatically but hopes to stand on its own; that must be plausible, but aspires to be something even more.  The band in Stereophonic includes Sarah Pidgeon, Tom Pecinka, Juliana Canfield, Will Brill, and Chris Stack. Stereophonic is now playing on Broadway—and the cast album will be out May 10. Thank you to Daniel Aukin, Marie Bshara, and Blake Zidell and Nate Sloan.  This episode was produced by Max Freedman and edited by Evan Chung, who produce the show with Katie Shepherd. Derek John is Executive Producer. Merritt Jacob is Senior Technical Director. If you haven’t yet, please subscribe and rate our feed in Apple Podcasts or wherever you get your podcasts. And even better, tell your friends. If you’re a fan of the show, please sign up for Slate Plus. Members get to listen to Decoder Ring and all other Slate podcasts without any ads and have total access to Slate’s website. Your support is also crucial to our work. Go to Slate.com/decoderplus to join Slate Plus today.  Learn more about your ad choices. Visit megaphone.fm/adchoices