Music fans have been making personal soundtracks for some 50 years, starting with the mixtape in the 1970s, then changing with technology to mixed discs in the 1990s (replacing cassette tapes with compact discs), then creating playlists in the 2000s for devices like iPods as well as streaming services like Spotify.

Typically, these homemade collections are just a way to put favorite and/or related songs together for consumption at particular times, such as parties, workouts, vacations or relaxation. And sometimes they're made for sharing - with friends or colleagues or a crush you're trying to impress.

The hosts of "How We Heard It" have certainly made more than their share mixtapes, mixed discs and/or playlists over the years, and in this episode they explain themselves - their themes, their intentions and what worked and what didn't - and why they would have hated each other's creations.

They also talk about sharing their mixes, walking the line between creating something others want to hear and creating something nobody wants to hear. (Spoiler alert: Read the room.)