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Every episode
Twenty Thousand Hertz
30 episodes
Colbert & Fallon: Mixing Music for Late Night TV
Ep 246 · Aug 10, 2026 · 42 min
Mixing music for Late Night television means working fast, putting artists at ease, and delivering polished mixes under immense pressure. In this episode, the Music Mixers of The Late Show with Stephen Colbert and The Tonight Show Starring Jimmy Fallon swap stories from decades behind the console. They reveal performances that went sideways, why backing tracks can actually make their jobs harder, and what it’s like mixing everyone from Cynthia Erivo to Paul McCartney. Featuring Harvey Goldberg a…
Listener Stories 2026 (Bronze): AI Music & Coral Crackles
Ep 245 · Jul 27, 2026 · 28 min
Twenty Thousand Hertz proudly presents the first five selections from our 2026 Listener Story competition. From AI-generated music, to the hidden crackle of coral reefs, to historic birdsong recordings, these bite-sized stories are crafted with curiosity and care. Twenty Thousand Hertz is produced by Defacto Sound. Subscribe on YouTube to see our video series. Follow Dallas on Instagram, TikTok, Facebook, and LinkedIn. Support…
Eurovision Song Contest: Inside the Gimmicks & Glamour
Ep 244 · Jul 13, 2026 · 34 min
For millions of people, Eurovision is a cultural institution, and one of the biggest live television events on Earth. But for many Americans, it remains a complete mystery. In this episode, producer Andrew Anderson takes Dallas and Grace on a joyful crash course through the history, music, controversies, and glorious absurdity of the Eurovision Song Contest. Along the way, they discover which music superstars got their start in Eurovision, how receiving “nul points” can ruin or launch a career,…
John Williams: A Composer’s Legacy
Ep 243 · Jun 15, 2026 · 36 min
In our last episode, we followed composer John Williams from his childhood to his 1970s run with Steven Spielberg and George Lucas. Now, we pick up the story as John enters an era of seemingly impossible success… from Raiders of the Lost Ark to Home Alone, Jurassic Park, Schindler’s List, and beyond. In this episode, we explore how John revived the grand orchestral score, conquered the classical music world, and crafted melodies that millions of people can instantly recognize. Along the way, jou…
John Williams: A Composer’s Life
Ep 242 · Jun 1, 2026 · 33 min
John Williams has written some of the most famous film scores ever, from Star Wars to Indiana Jones to Jurassic Park. But before the blockbuster success, there was a kid growing up around jazz musicians in New York, and a young composer trying to find his voice. In this episode, journalist Tim Greiving takes us through John’s early life and career, from his years as a session player to the meeting with Steven Spielberg that changed everything. Along the way, we unpack the stories behind John’s e…
Age of Audio: The Future of Podcasting (and 20k)
Ep 241 · May 25, 2026 · 29 min
After making Age of Audio, a feature documentary about the history of podcasting, filmmaker Shaun Michael Colón sat down with Dallas for a revealing conversation about the state and future of this industry. Together, Dallas & Shaun unpack the shift toward celebrity chit chat shows, what gets lost in video, the real economics of making Twenty Thousand Hertz, and why highly crafted audio storytelling still matters. Learn about this year’s Listener Stories competition and submit your story at 20k…
Age of Audio: The Inside Story of Podcasting
Ep 240 · May 18, 2026 · 40 min
The history of podcasting has rarely been told. But in this episode, the brightest minds in podcasting reveal the inside story of this medium: from the invention of RSS feeds, through the Gold Rush era of corporate investments, to the bubble bursting, and the rise of celebrity podcasts. Along the way, Ira Glass explains the origins of This American Life and Serial, Marc Maron recounts Obama visiting his garage, Roman Mars lays out his vision for indie podcasts, and so much more. This story was a…
The Poop Song Conspiracy
Ep 239 · May 11, 2026 · 37 min
One day, Ethan had an unfortunate bathroom incident. Then, he found an entire collection of songs online with his name in the title… and they all seemed to be about that embarrassing moment. That experience sent Ethan and his sister down a bizarre rabbit hole involving AI music, lots of poop jokes, and possibly the world’s most prolific songwriter. This story comes from the Hyperfixed podcast. Learn about this year’s Listener Stories competition and submit your story at 20k.org/2026. Twenty Thou…
The Heartfelt Music of Bluey w/ Composer Joff Bush
Ep 238 · May 4, 2026 · 28 min
What makes the music of Bluey feel so warm and alive? In this episode, Dallas travels to Brisbane, Australia to visit the studio of Bluey’s composer Joff Bush. There, Joff reveals the quirky instruments, musical easter eggs, and songwriting philosophy behind this beloved series. Along the way, he breaks down the music of two iconic Bluey episodes, “Sleepytime” and “The Sign.” Learn about this year’s Listener Stories competition and submit your story at 20k.org/2026. See Dallas tour Joff's studio…
The Acoustic Worlds of Radiolab Creator Jad Abumrad
Ep 237 · Apr 20, 2026 · 34 min
Before Radiolab became a cultural phenomenon, it was an experiment… one that Jad Abumrad built voice by voice, sound by sound. In this episode, Jad walks Dallas through his journey with the show, from its scrappy beginning in a New York basement, to leading a massive team, and ultimately stepping away. Along the way, he breaks down his signature sound design and storytelling techniques, and how he’s carried those into newer projects like Dolly Parton’s America and Fela Kuti: Fear No Man. Learn a…
He was deaf for 35 years + Listener Stories kickoff
Ep 236 · Mar 23, 2026 · 27 min
Last year, we ran three full episodes of listener-produced stories. But one beautiful story was just a little too long for the final cut… and we couldn’t leave it behind. In this episode, sound designer Jesse Herrera tells the story of his grandfather, who lived in silence for 35 years before receiving a cochlear implant, and the overwhelming, joyful process of learning to hear again. Afterwards, Dallas and Casey reflect on last year’s Listener Stories and kick off this year’s competition. Learn…
Harry Potter and the Sound Designer’s Stone
Ep 235 · Mar 9, 2026 · 30 min
Harry Potter has been brought to life on page and screen. But what would it take to make the wizarding world come alive using sound alone? In this episode, we go behind the scenes of the new full-cast editions of the Harry Potter series, where a team of sound designers spent eighteen months crafting 130 hours of immersive audio. From the whistle of the Hogwarts Express to the rasp of the Dementors, every spell, creature, and location had to sound tangible and emotionally distinct. Featuring Will…
When Everything Stopped, He Started Listening
Ep 234 · Feb 23, 2026 · 25 min
David Jeffers has always understood the world through sound. As a kid, he bounced beats between tape decks and built speaker boxes from spare parts. After college, he founded an underground hip hop label. Then came the day that split his life in two. And in the quiet that followed, David started listening more deeply… and piece by piece, he built a new life, guided not by what he lost, but what he could create. For news about Quad Life, the upcoming documentary about David, follow Quad_Life_Do…
The State of the 20K Multiverse™
Ep 233 · Feb 9, 2026 · 35 min
What happens when a podcast about sound gets into video? In this special behind-the-scenes episode, producer Grace East flips the script and interviews Dallas about his leap into visual storytelling, and how the different pieces of the 20K Multiverse all fit together. From backstage at SNL, to Disney Imagineering’s archives, to real-life Bluey locations, Dallas reveals the anxieties, lucky breaks, and human connections behind our new video series. Subscribe on YouTube to see o…
Doctor Who & The BBC Radiophonic Workshop
Ep 232 · Jan 26, 2026 · 36 min
What does a time machine sound like? Or a magic carpet? For the BBC Radiophonic Workshop, that was just another day at the office. For 40 years, this oddball collective of engineers and composers pushed the boundaries of sound design, crafting eerie atmospheres, quirky jingles, and the iconic audio of Doctor Who. In this episode, we explore the rise and fall of this pioneering studio with composer and archivist Mark Ayres, and uncover how these sonic wizards shaped the future of sound. Twenty Th…
Butterfly in the Synth: Reading Rainbow’s Magical Theme Song
Ep 231 · Jan 12, 2026 · 25 min
The theme song to Reading Rainbow has been delighting kids (and nostalgic grown-ups) for over 40 years. But how did this instantly iconic track come to be? In this episode, composer Steve Horelick reveals the unlikely story of its creation, from its empowering lyrics, to its “fluttering butterfly” synth sound, to how Chaka Khan and a mystery drummer helped shape one of its later versions. Support the show and get ad-free episodes at 20k.org/plus. Twenty Thousand Hertz is produced b…
Auld Lang What? The surprising origins of the New Year’s song
Ep 230 · Dec 31, 2025 · 20 min
Every New Year’s at midnight, we raise our voices to sing a song that few of us understand: “Auld Lang Syne.” So when and why did this become the anthem of the holiday? In this episode, our friends at the Smithsonian’s Sidedoor podcast trace the mysterious rise of “Auld Lang Syne” from rural Scotland, to a New York jazz club, to a classic film and an iconic actor. Featuring folklorist Jim Deutsch. Support the show and get ad-free episodes at 20k.org/plus. Subscribe to Sidedoor wh…
Guess That Sound 2025: Youtube Channel Champs
Ep 229 · Dec 17, 2025 · 44 min
For our sixth annual Mystery Sound game show, we’ve invited three guests from our video series to test their sonic knowledge on 18 sounds, including production logos, video game FX, bird calls, strange instruments, and more. So put on your listening cap and get ready to guess along in this surprising and hilarious competition. Featuring Jake Hartsfield, Carlos Torres, and John Michael Hinton. Support the show and get ad-free episodes at 20k.org/plus. Twenty Thousand Hertz is produc…
The Sound of Fallout: From Iconic Games to Prestige TV
Ep 228 · Dec 3, 2025 · 39 min
Behind Fallout’s apocalyptic sci-fi and retro nostalgia is a masterclass in sound design. In this episode, we explore how the audio teams behind both the video games and the TV series built Fallout’s signature sonic identity, from Pip Boy clicks to weapon blasts to mutant roars. Along the way, we uncover how the show’s creators honored the classic game sounds while reimagining them for a bigger, more cinematic experience. Featuring Mark Lampert, Sue Cahill, Daniel Colman, Steve Bucino, and Keith…
Defying Gravity: The Audio Wizardry of Wicked's Live Vocals
Ep 227 · Nov 19, 2025 · 30 min
In movie musicals, the vocals are almost never recorded live on-set. Instead, the actors pre-record their songs, then lip sync to those recordings while filming. But on Wicked, they threw out the rulebook, and recorded all of the lead vocals live. In this episode, Production Sound Mixer Simon Hayes reveals how they pulled off this audio feat. From cleverly disguised lav mics and in-ear monitors, to “silent wind” machines, to a jaw-dropping live performance of “Defying Gravity,” this is the story…
The Secret Soundtracks of Movies & TV
Ep 226 · Nov 5, 2025 · 43 min
In the ‘60s and ‘70s, world-class musicians gathered in smoky studios to record tracks that you couldn’t buy in a store… but ended up everywhere. In this episode, Dallas and the TTH crew dive into the golden age of production music: versatile cues crafted for everything from car chases to romantic montages to space odysseys. Along the way, they uncover how these obscure records found their way into sports broadcasts, hip hop singles, and modern sitcoms, and reveal the vintage library track that…
Inside Imagineering: How Sound Powers Disney Magic
Ep 225 · Oct 22, 2025 · 23 min
Sound is a crucial part of what makes Disney parks feel magical… and it all starts inside the closely-guarded rooms of Walt Disney Imagineering. In this episode, Imagineers John Dennis and Greg Lhotka break down how they use music and audio to bring attractions to life, from speaker systems hidden in rock work, to the intricate timing of a Frozen water ride. Then, they reveal the surprising story of how one of Disney’s most iconic songs got a brand new verse, more than half a century after its d…
Live from New York, I’m Retired! SNL’s Sound Legend Signs Off
Ep 224 · Oct 8, 2025 · 33 min
Behind Saturday Night Live, there’s a small army of audio professionals making the whole thing sound effortless. In this episode, Dallas goes behind the scenes at Studio 8H to meet Robert Palladino, who’s mixed SNL for 40 years… and is about to do it one last time. Along the way, he gets an unprecedented look at how this legendary show is mixed, and talks to the new Production Mixer Fred Hedemark about stepping into Bobby’s shoes. Watch Dallas' trip to SNL on Youtube. Twenty Thousand Hertz is pr…
The Nursery Rhyme That Ruined a Rock Band
Ep 223 · Sep 24, 2025 · 30 min
When a quiz show host asked a simple question about nursery rhymes, it seemed like harmless fun. But that moment triggered a lawsuit that would threaten to bring down one of Australia’s most iconic rock bands. In this story from the Cautionary Tales podcast, we follow the unlikely court case of Men At Work’s “Down Under,” exploring the fine line between inspiration and infringement, and the collateral damage of copyright. Follow Cautionary Tales wherever you get your podcasts. Twenty Thousand He…
Listener Stories 2025 (Gold): Transit Tunes & Childhood Chimes
Ep 222 · Sep 10, 2025 · 26 min
We’re proud to present the winning entries from our Listener Stories competition: five listener-made shorts that rose to the very top. From clever tinnitus tonics to melodic subway signals, from mischievous church bells to a guitar that speaks in whispers, this Gold Collection is rich with emotion, originality, and sonic craft. Twenty Thousand Hertz is produced by Defacto Sound. Subscribe on YouTube to see our video series. If you know what this week's mystery sound is, tell us…
Yahoo! The Yodel Heard Around the World
Ep 221 · Aug 27, 2025 · 23 min
It’s one of the quirkiest, most iconic sonic logos ever: a four-note vocal flourish that defined the early internet. In this episode, we follow the Yahoo Yodel on its unlikely journey from the snowy Swiss Alps to ‘90s country bars to Super Bowl ads. Along the way, we meet the real-life cowboy behind this yodel, whose voice launched a billion clicks... as well a high-stakes legal battle. Featuring musician and yodeler Wylie Gustafson. Twenty Thousand Hertz is produced by Defacto Sound. Subscribe…
Super Mario Bros: Koji Kondo’s 8-Bit Masterpiece
Ep 220 · Aug 13, 2025 · 31 min
From the springy jump sound to the iconic Overworld Theme, the sound of Super Mario Bros. is instantly recognizable. With just five lo-fi audio channels and 40 kilobytes of space, composer Koji Kondo created a soundscape full of unforgettable melodies. In this episode, we explore how Kondo’s playful instincts, rhythmic trickery, and love of jazz fusion defined the sound of Mario. Featuring Kirk Hamilton of Strong Songs and Thomas of Thomas Game Docs. Twenty Thousand Hertz is produced by Defacto…
Listener Stories 2025 (Silver): Pinball Pings & Airport Acoustics
Ep 219 · Jul 30, 2025 · 28 min
Presenting the second collection from our Listener Stories competition, featuring five short pieces written and produced entirely by our audience. From the sonic evolution of pinball to reused classical melodies to the battle against airport noise, this Silver Collection is a diverse and enlightening set of snackable stories. Twenty Thousand Hertz is produced by Defacto Sound. Subscribe on YouTube to see our video series. If you know what this week's mystery sound is, tell us at…
Mixing Madison Square Garden for Vulfpeck’s Biggest Show
Ep 218 · Jul 16, 2025 · 36 min
When Vulfpeck played a sold-out show at Madison Square Garden, the performance looked effortless. But behind the scenes, their Front of House Engineer and Tour Manager Jake Hartsfield was juggling missing tickets, technical curveballs, and mixing seventeen dynamic musicians through a nearly two-hour set. In this episode, we follow Jake through one extraordinarily high-stakes day, and discover just how much craft, preparation, and composure it takes to make a live show feel magical. Twenty Thousa…
The Music of Jeopardy! From a Lullaby to $100,000,000
Ep 217 · Jul 2, 2025 · 23 min
It’s the most recognizable TV theme in America. But Jeopardy’s “Think Music” wasn’t originally written for a game show… It was written for a toddler. In this episode, we trace the unlikely journey of the Jeopardy theme, from Merv Griffin’s living room to over 10,000 episodes across six decades. Along the way, we explore the show’s sonic evolution, including honking buzzers, 80s synths, and orchestral remixes. Featuring Lisa Broffman, Jeopardy’s Consulting Co-Executive Producer. Twenty Thousand H…
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