When a Horror Film Asked Guests to Leave a Message After the Tone, We Delivered

You already know us as the people who show up to your best friend's wedding with a vintage rotary phone, a personalized prompt, and the ability to capture your loved ones’ voicemails in all their tearful glory. That's our bread and butter. Rotary phones and recorded voicemails, at unforgettable events like weddings and baby showers. It's what we do, and we love it.

But lately? Brands have been calling on us for something a little different.

Over the past couple of years, companies have started realizing that an audio guestbook for corporate events is not just a cute novelty, it's a genuinely powerful touchpoint. From employee feedback activations to immersive customer experiences, we've had the privilege of working with some impressive names: Adobe, Visit Philly (on a Philadelphia Eagles campaign, go Birds), Universal Music Group, AT&T, and more. Each one came to us with a unique vision, and each one left with something they couldn't have gotten anywhere else: the real, unfiltered voice of their audience.

But our most recent corporate activation? It might just be our best one yet.

A24 Needed Someone Who Understood the Power of Sound. Enter After The Tone.

If you haven't heard of Undertone yet, get ready to sleep with the lights on. The film, released in theaters on March 13, 2026 by A24, follows Evy (Nina Kiri), a skeptical paranormal podcast host who begins receiving a series of mysterious audio recordings from an anonymous source. Each audio file more terrifying than the last. Each one pulling her deeper into paranoia, dread, and something she can't explain away. Critics called it "a diabolically immersive aural nightmare," and audiences described sitting in their seats trembling by the time the credits rolled.

What makes Undertone uniquely unsettling is that the horror lives almost entirely in the sound. You don't see the monster. You hear it. The film weaponizes distorted audio and the creeping dread of not knowing what's coming through your headphones next. It's a movie that understands the power of sound and noise.

So when A24 came to After The Tone looking for a corporate activation idea that would match that energy outside the theater, it felt less like a business meeting and more like a haunted house.

The Activation: A Podcast Booth That Would Make Ghosts Proud

Picture this. You've just walked out of Undertone. Your heart is still racing. You're questioning whether you should have watched that alone. And then, right there in the theater lobby, you see an eerie podcast booth, draped in atmosphere, fitted with headphones, daring you to put them on.

A prompt plays, complete with unsettling background noise and audio cues pulled straight from the world of the film. Then it asks you how you felt about the film.

And you leave a voicemail.

That's the activation we built with A24 for Undertone. Fresh off one of the scariest movies of the year, moviegoers stepped right into the world of the film to record their raw, unfiltered reactions. 

It was the perfect synthesis of a film that's all about the act of listening, and a company that's all about capturing the human voice. 

Why Audio Works So Well for Unique Corporate Activations

Here's what we've learned from working with brands across industries: people remember how something made them feel. Not the booth design or the brochure they picked up.

Audio is uniquely good at delivering that feeling, because a voice carries weight that a typed response never can. When someone leaves a voicemail, they're not composing a tweet or filling out a survey. They're just talking, and simultaneously providing something uniquely human. And the brand on the other end gets something irreplaceable: a real reaction from a real person.

That's why our audio guestbook for corporate events keeps showing up in the toolkits of marketers, event producers, and brand experience teams who are done with the same old photo booth and branded swag bags. Whether the goal is collecting employee feedback, creating a memorable customer touchpoint, generating authentic social content, or just leaving guests with an experience they'll actually talk about on Monday morning, the format works.

And when you pair it with the right creative vision, like A24's commitment to making every sensory experience count, it doesn't just work… it haunts people. 😉

From Weddings to A24: We're Ready for Your Vision

We still absolutely love showing up to your wedding with a vintage rotary phone. That's not going anywhere. There's something genuinely magical about a room full of people leaving voicemails for a couple they love, and we get to be the vessel for that. It's a privilege we don't take lightly.

But if you're a brand, a nonprofit, an event producer, or a company looking for corporate event ideas that actually create a moment rather than just filling a time slot, we want to hear from you. Because whether it's a horror film premiere, a company all-hands, a gala, or a product launch, we know how to build an audio experience that fits your world.

After all, nobody knows better than we do what happens when you ask someone to speak from the heart and just listen.

Book an audio guest book for your next corporate activation, or reach out to our sales line at 1-855-771-4855 to chat through your idea.