In the late ‘90s, Brian Johnson and Brian Morden were suburban teenagers obsessed with video games and music. And then, through an extraordinary wish, the two friends found themselves on a journey that made gaming history. In this episode, we explore how a single line of dialogue became a timeless piece of Halo lore, and the profound impact it had on everyone involved. Donate to the Make-A-Wish Foundation and Brian Morden Foundation. Explore the all new Defacto Sound website, and click the Conta...
Mar 05, 2025•47 min•Ep 209•Transcript available on Metacast What sound can teach us about our Sun? In this episode, we explore how NASA scientists translate electromagnetic waves from the Sun into sound, and even music. Through this process, researchers are gradually unlocking the Sun’s secrets, from the steady “hum” of the star’s rotation, to the way that solar winds “play” the Earth’s magnetosphere like a harp. This story comes from the podcast NASA’s Curious Universe, and features Host and Astrophysicist Padi Boyd, Sonification Specialist Robert Alexa...
Feb 19, 2025•38 min•Ep 208•Transcript available on Metacast In the late '80s and early '90s, a seismic subculture shook the streets… literally. “Boom Cars,” decked out with custom sound systems, roamed neighborhoods blasting the bassiest music ever recorded. But where did this movement come from, and why did it fade away? In this episode, we dive into the world of Miami Bass, dB Drag Racing, and the infamous tapes that could shred your subwoofers. Featuring journalist Jesse Serwer and Bass Music pioneer DJ Magic Mike. Explore the all new Defacto Sound we...
Feb 05, 2025•32 min•Ep 207•Transcript available on Metacast If you turn on the radio, there’s one thing you’re almost guaranteed to hear: a catchy, over the top jingle proclaiming the name and call letters of the radio station. But where did these little tunes come from? Who makes them? And why are they still so common? In this episode, we explore the history of radio ID jingles, and pack in so many earworms, you’re going to need an exterminator. Featuring Jeanna Isham of Dreamr Productions, Jon Wolfert of JAM Creative Productions, and Erik Huber of Reel...
Jan 22, 2025•38 min•Ep 206•Transcript available on Metacast For our fifth annual Mystery Sound Game Show, Dallas invited three friends from the world of professional audio to compete against each other. So crank up the volume and see how many sounds you can guess. Featuring Dialog & ADR Editor Austin Olivia Kendrick, Sound Designer Mike James Gallagher, and Sound Designer Zachary Quarles. If you know what this week's mystery sound is, tell us at mystery.20k.org. Follow Dallas on Instagram, TikTok and LinkedIn. Watch our video shorts on YouTube, and join ...
Dec 04, 2024•47 min•Ep 205•Transcript available on Metacast We all know that dogs are smart, sensitive creatures, but interpreting their vocalizations and behaviors can still be a challenge. In this episode, animal behaviorist Daniel Mills reveals the true meanings behind dogs’ noises, actions, and body language. Then, author Pilley Bianchi tells the story of Chaser, the border collie who became known as “The Smartest Dog in the World” for the way that she learned language. If you know what this week's mystery sound is, tell us at mystery.20k.org. Follow...
Nov 20, 2024•43 min•Ep 204•Transcript available on Metacast Cats can be very vocal creatures, but the exact meaning and intention behind these sounds can often be hard to read. In this episode, cat behaviorist Sarah Brown unpacks the hidden meanings behind cats’ vocalizations, body language and behavior. Then, veterinarian Kendra Baker takes us through her journey with Billi (AKA “Her MADjesty”) the cat who became an online sensation for her use of speaking buttons. If you know what this week's mystery sound is, tell us at mystery.20k.org. Follow Dallas ...
Nov 20, 2024•42 min•Ep 203•Transcript available on Metacast Despite Bluey’s enormous, global popularity, the cast and crew are a tight-knit family, often literally. In part 2 of our story on Bluey, the show’s sound designer and mixer Dan Brumm breaks down the surprising connections between the voice actors, the real-life inspiration behind classic episodes, and how he ended up voicing a key role on the show. If you know what this week's mystery sound is, tell us at mystery.20k.org. Follow Dallas on Instagram, TikTok and LinkedIn. Watch our video shorts o...
Oct 23, 2024•31 min•Ep 202•Transcript available on Metacast Since its debut in 2018, Bluey has become one of the most popular and beloved TV shows of all time. In this episode, Bluey’s sound designer and mixer Dan Brumm walks us through how the show began, the unique challenges of season one, and the lengths he goes to give the show its organic sound. Plus, Dallas reveals the secret timing of the Bluey theme song. If you know what this week's mystery sound is, tell us at mystery.20k.org. Follow Dallas on Instagram, TikTok and LinkedIn. Watch our video sh...
Oct 09, 2024•33 min•Ep 201•Transcript available on Metacast “Blah, blah, blah” and “yada, yada, yada” have had plenty written about them. But there’s a longtime cousin of these phrases that’s much less understood. We use it all the time, yet it’s not in the dictionary. It’s not even Google-able. In this episode, we investigate the linguistic mysteries of the Five Dah Phenomenon. Featuring linguist & philosopher Paul Saka, and psychologist Helen Abadzi. If you know what this week's mystery sound is, tell us at mystery.20k.org. Follow Dallas on Instagram, ...
Sep 25, 2024•30 min•Ep 200•Transcript available on Metacast The Lofi Girl YouTube channel has over 14 millions subscribers, and at any given time, tens of thousands of people are listening together. Created by a mysterious French producer named Dimitri, the channel features a 24/7 livestream of an anime girl studying in her room, listening to lofi hip hop. In this episode, we dive into the Lofi Girl lore, chart the explosion of the Lofi Multiverse, and hear from a music therapist about how lofi affects our brains and behavior. This story was adapted from...
Aug 28, 2024•34 min•Ep 199•Transcript available on Metacast The sounds our bodies make can tell doctors all kinds of surprising things about our health. In this episode, we unpack the history of sound in medical diagnosis, from Hippocratic times, to the invention of the stethoscope, to the specialized tools and AI systems used today. Along the way, we’ll hear detailed recordings of these medical sounds, and learn what each of them means. Featuring Dr. David Steensma and Dr. Daniel Weiss. Visit OnePlus.com to buy the new Buds Pro 3, featuring dual DACs, a...
Aug 21, 2024•28 min•Ep 198•Transcript available on Metacast In Part 2 of our deep dive into Apple’s iconic sound design, the Apple Design Team unpacks the iPhone’s trio of default ringtones, the evolution of their alarm sounds, the UX sounds of the AirPods Pro, and much more. Along the way, legendary beatmaker Flying Lotus breaks down his collaboration with Apple, and the Design Team reveals how they use haptics as a standalone “instrument.” Featuring Billy Sorrentino, Hugo Verweij and Flying Lotus. Sign up for Twenty Thousand Hertz+ to get our entire ca...
Aug 14, 2024•29 min•Ep 197•Transcript available on Metacast Over the last few decades, Apple has produced some of the most recognizable sounds ever made. In this episode, the Apple design team pulls back the curtain on their sound design philosophy and process, from the evolution of the classic “Tritone” alert, to the surprising origins of the Apple Watch sounds, to the inspiration behind the latest notification tones. Featuring Billy Sorrentino, Hugo Verweij and Kelly Jacklin. Sign up for Twenty Thousand Hertz+ to get our entire catalog ad-free. If you ...
Jul 31, 2024•30 min•Ep 196•Transcript available on Metacast For this special episode, we’ve passed the mic to our listeners to hear six unexpected stories about sound. Featuring auditory hallucinations, amplified heartbeats, long remembered voices, and whistles both strange and familiar. Sign up for Twenty Thousand Hertz+ to get our entire catalog ad-free. If you know what this week's mystery sound is, tell us at mystery.20k.org. Follow Dallas on Instagram, TikTok and LinkedIn. Watch our video shorts on YouTube, and join the discussion on Reddit and Face...
Jun 26, 2024•26 min•Ep 195•Transcript available on Metacast Many of the songs we sing to our children are hundreds of years old, with their original meanings obscured by history. In this episode, producer Leila Battison takes Dallas on a dark, surprising journey through history’s most famous nursery rhymes and lullabies, and up through the “Baby Sharks” and “Happy Songs” of today. Along the way, they share the songs they’ve made up for their own children, and explore why this music is just as important to parents as it is to kids. Sign up for Twenty Thou...
May 29, 2024•47 min•Ep 194•Transcript available on Metacast Whale songs are some of the most beautiful, cathartic sounds in nature. These extraordinary creatures use sound to socialize, to mate, to find food, and avoid predators. But for aquatic animals, the sounds of human activity can be absolutely devastating. With underwater noise pollution on the rise, what can we do to ensure the survival of these amazing creatures? Featuring acoustician Al Jones, Professor John Hildebrand of the Scripps Institution of Oceanography, and Vox Senior Producer Christop...
May 22, 2024•28 min•Ep 193•Transcript available on Metacast TikTok’s sonic logo is one of the fastest growing sonic logos in history. Today, that little sound is being heard millions of times a day on apps like Instagram, Reddit and Youtube… but creating it wasn’t easy. To make it, the creative team went through thousands of iterations, executed a covert marketing strategy, and fought through a final debate about a single note. Featuring Roscoe Williamson and Aifric Lennon from MassiveMusic. Apply for the Associate Sound Designer/Mixer position at Defact...
May 08, 2024•26 min•Ep 192•Transcript available on Metacast The sound of Late Night television is a complex beast with many moving parts. In this episode, we step inside the daily hustle of Broadcast Mixer Fred Hedemark as he and his team bring the sound of Late Night with Seth Meyers to life. Along the way, Fred reveals the highs and lows of working on a high-adrenaline, live-to-tape TV show, and shares some never-heard recordings from his years on the show. Sign up for Twenty Thousand Hertz+ to get our entire catalog ad-free. If you know what this week...
Apr 17, 2024•30 min•Ep 191•Transcript available on Metacast What do you call it when you’re homesick for a place you’ve never been? Is there a word for letting books pile up in your house without reading them? How about weather that looks beautiful out the window, but that you wouldn’t want to go out in? For this episode, we worked with Babbel to bring you our second annual Untranslatable Words challenge. In it, resident linguist Grace East pits the Twenty Thousand Hertz crew against each other in a hilarious and enlightening multilingual game show. Sign...
Apr 03, 2024•29 min•Ep 190•Transcript available on Metacast Hans Zimmer is responsible for some of the most iconic film scores of the last 35 years. So how does one person create so much amazing music? It turns out, he doesn’t do it alone. In this episode, Hans Zimmer’s incredible team pulls back the curtain to reveal their extraordinary creative process, and uncover the secrets behind the otherworldly music of Dune. Featuring Raul Vega, Taurees Habib, Suzanne Waters, Tina Guo, and Steve Mazarro. Sign up for Twenty Thousand Hertz+ to get our entire catal...
Mar 20, 2024•50 min•Ep 189•Transcript available on Metacast All over the world, there are unique and breathtaking sounds that you can only hear in one specific place. In this episode, we travel to two of the most astounding sonic wonders in the United States. The first is a hidden sound installation in Times Square that might be the most visited art exhibit on Earth. The second is an enormous organ built right into the rock of an ancient Virginian cave. These stories originally aired on the Atlas Obscura podcast. Sign up for Twenty Thousand Hertz+ to get...
Mar 06, 2024•31 min•Ep 188•Transcript available on Metacast If you listen to vintage music, one of the first things you’ll notice is the complete lack of bass. But turn on a Top 40 station today, and you’ll hear song after song with deep, sub-ratting bass tones. So how and why did this change happen? For this episode, we worked with OnePlus to tell the story of our collective obsession with bass, and the one device that transformed the sound of popular music. Featuring hip-hop legend DJ Jazzy Jeff and Roland's Paul McCabe. Buy the OnePlus Buds 3, featuri...
Feb 28, 2024•27 min•Ep 187•Transcript available on Metacast For more than three decades, it was common for American companies to put on “industrial musicals” for their employees. These elaborate productions could rival Broadway shows, and featured original songs about the company and its products. And while this music was never intended for the general public, once you hear it for yourself, you might just get hooked. This is a story about bathroom remodeling, corporate art, and one man’s obsession with a forgotten corner of pop culture. Featuring comedy ...
Feb 21, 2024•34 min•Ep 186•Transcript available on Metacast Today, virtually every streaming platform has a sonic logo, from HBO’s classic “Static Angel” to the iconic Netflix “Tudum.” For Hulu, standing out in such a crowded marketplace has been a process of experimentation and revision. In this episode, we chart the evolution of Hulu’s sonic branding across 5 unique sonic logos. Along the way, the creative team shares unused alternate versions for the first time, and breaks down how they used AI to test their latest sound. Featuring Dan Capstick of Dix...
Jan 24, 2024•29 min•Ep 185•Transcript available on Metacast The world of sound is full of great stories. To get in touch with your sonic world, follow Twenty Thousand Hertz right here in your podcast player. If you’re already a listener, send this trailer to someone you know would love the show. Learn more about your ad choices. Visit megaphone.fm/adchoices
Jan 17, 2024•2 min•Transcript available on Metacast For our fourth annual Mystery Sound Game Show, we pitted the winners from the past three years against each other. The result? Chaos and hilarity. So unclog your ears, put on your listening cap, and get ready to play along. Featuring Travis McElroy, John Lagomarsino and Emily Jankowski. Follow Dallas on Instagram, TikTok, YouTube and LinkedIn. Join our community on Reddit and follow us on Facebook. Sign up for Twenty Thousand Hertz+ to get our entire catalog ad-free. If you know what this week's...
Dec 13, 2023•49 min•Ep 184•Transcript available on Metacast From electric guitars to samplers to drum machines and beyond, the music we love is only possible thanks to the technology used to create it. In many ways, the history of popular music is really a history of technological innovation. In this episode, we partnered with BandLab to unpack four inventions that changed music forever. Featuring author and journalist Greg Milner. Follow Dallas on Instagram, TikTok, YouTube and LinkedIn. Join our community on Reddit and follow us on Facebook. Sign up fo...
Nov 29, 2023•27 min•Ep 183•Transcript available on Metacast The world of headphones is a deep rabbit hole. With thousands of options and endless technical jargon, it’s hard to know which factors really matter, and which ones are just marketing gimmicks. In this episode, we cut through all of the gobbledygook, and break down the ins and outs of headphones to help you find your perfect pair. Featuring Wirecutter’s resident headphone expert Lauren Dragan. Follow Dallas on Instagram, TikTok, YouTube and LinkedIn. Join our community on Reddit and follow us on...
Nov 15, 2023•29 min•Ep 182•Transcript available on Metacast Since the earliest days of commercial radio, companies have been using sound to worm their way into our brains. And over the decades, they’ve come up with all kinds of sonic tactics to make us want, crave and remember their products. In this episode, we take a whirlwind tour through the sounds of persuasion. This story was adapted from Under the Influence with Terry O’Reilly. Follow Dallas on Instagram, TikTok, YouTube and LinkedIn. Join our community on Reddit and follow us on Facebook. Sign up...
Nov 01, 2023•26 min•Ep 181•Transcript available on Metacast 
