After composer Eric Whitacre finished Virtual Choir number 5 in 2018, he thought the project might be done for good. But 2020 was just around the corner, and the Virtual Choir was far from over. For our last episode of the year, we've re-edited and remixed our episode about the Virtual Choir, and added a brand new section to bring the story up to the present.

Alan Lomax believed that the culture of poor Americans was important and worthy of saving. So he spent decades traveling the American South to record obscure musicians on their front porches, in churches, even in prisons. Today, he's considered an American icon, but the road to becoming a legend wasn't an easy one. Featuring Southern Historical Collection archivist Chaitra Powell, American Folklife Center curator Todd Harvey, and filmmaker Rogier Kappers.

Sci-fi and fantasy creators often use constructed languages (or conlangs) to help us believe that the characters come from ancient times or distant galaxies. But what happens when a fictional language jumps off the screen and into the real world? This story comes from the podcast Imaginary Worlds.

We've all heard the iconic recordings from the Apollo missions. But how exactly does NASA manage to run live audio between Earth and the moon? And how might we chat with astronauts on Mars and beyond? Featuring Astronaut Peggy Whitson, NASA Audio Engineer Alexandria Perryman, and Astrophysicist Paul Sutter.

Technology has the power to transform the way our world sounds. It could even give us entirely new ways to experience our surroundings. In this episode, we explore the sounds of the future, and how can we use the tools we already have to build a better sounding world. Featuring Rose Eveleth, Creator and Host of the podcast Flash Forward, Acoustician Andrew Pyzdek, and Architect Chris Downey.

Sound surrounds us, even in the quietest moments. But depending on how we hear, the world can be a different auditory experience for each of us. This episode features four stories from the TED Radio Hour.

For hundreds of years, composers have been using a specific four-note melody to evoke death. It's appeared in dozens of famous movies, and you probably never even realized it. But once you hear it, you'll start noticing it everywhere. Featuring musicologist Alex Ludwig and Strong Songs Host Kirk Hamilton.

People with perfect or "absolute" pitch hear every single sound as precise musical notes. Is this extraordinary talent a blessing or a curse? In this episode, we dive into the neuroscience, pluses and pitfalls of absolute pitch. Featuring neuroscientist Daniel Levitin and Grammy-winning musician Jacob Collier.