# The Mp3 Experiment — from Improv Everywhere > Synchronized audio playback for interactive public performance events. (iPhone/iPad app by Improv Everywhere Productions, Inc..) - Source: https://appshunter.io/ios/app/the-mp3-experiment/id537991205 (this page in markdown: same URL + `.md`) - Developer: [Improv Everywhere Productions, Inc.](https://appshunter.io/developer/1141107519) - Category: Entertainment, Lifestyle - Price: Free - Rating: 3.75/5 from 12 App Store ratings · 23 written reviews indexed - Age rating: 4+ - Requires: iOS 15.1 · 38 MB - Languages: English - Released: 2012-07-02 - Data updated: 2026-06-04 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/the-mp3-experiment/id537991205/reviews.md ## What is The Mp3 Experiment? This app powers Improv Everywhere's Mp3 Experiment project. The app will synchronize playback of a custom audio file for all participants who have downloaded it and joined the event. Users simply need to have the app open at the event's start time, and the audio will automatically begin playing in sync. The Mp3 Experiment is a participatory audio adventure where attendees download an audio file and listen to synchronized secret instructions in a public space. Hilarity ensues as participants carry out ridiculous, synchronized instructions delivered to their headphones via narrator "Steve" and everyone else tries to figure out what in the world is going on. We stage a new Mp3 Experiment in New York each year and also tour the project to college campuses and festivals around the world. More information: http://mp3experiment.com/ ## Key features - Synchronized audio playback - Participatory audio adventures - Custom audio file synchronization - Automatic playback at event start - Live event guidance ## Recent user reviews (10 of 23) All indexed reviews: https://appshunter.io/ios/app/the-mp3-experiment/id537991205/reviews.md ### 5/5 — Works Well! *2024-06-21, version 5.0.10* The app has worked perfectly for me over the last several years. I use it once per year at the events among all the many other participants and have not noticed or heard of the app not similarly operating properly and easily for others. That’s my experience. Simple, nicely functional and fun! Enjoy The Mp3 Experiment! ### 5/5 — So much fun! *2023-08-28, version 5.0.10* I look forward to the Mp3 Experiment every summer in NYC! It’s always a joyous blast. The new version of the app worked perfectly this year. Thank you! ### 1/5 — Doesn’t Work *2021-09-18, version 5.0.0* was required to get this app for a class. i downloaded the day ahead like recommended. when i got to where the event was taking place, no ones app would load the audio. completely ruined the experiment and the whole purpose of the experiment because our professors had to play the audio through speakers. ### 5/5 — Works flawlessly *2019-06-16, version 3.0.5* The update they made to this app is awesome. Works perfectly. What a fun way to get a big crowd of people in sync. My family goes to the NYC event every summer. ### 1/5 — Didn't work *2014-09-20, version 1.2* The app started the mo3 experiment 5 minutes too early and then ended 20 minutes too soon. ### 5/5 — Love It *2014-06-28, version 1.2* I love Improv Everywhere and I'm so happy I can access all of the missions at the click of a button! ### 1/5 — Bad Download *2014-01-13, version 1.2* While trying to download the app on my iPhone 5 with iOS 7, there pops up an error message saying "The item you tried to buy is no longer available". Did the App Store remove this app? Tried everything, still won't download with same error message. ### 2/5 — Bad app *2013-07-15, version 1.2* I am using iPhone4S, downloaded the app, tried to start the program at 3:05pm and never worked. The track is not in my music list as well. =_= ### 5/5 — Charlie *2013-05-01, version 1.1* So creative! ### 5/5 — Awesome *2013-03-04, version 1.1* Improv Everywhere is amazing and so is this app :) ## Frequently asked questions about The Mp3 Experiment ### What is The Mp3 Experiment app used for? The Mp3 Experiment app is used to synchronize custom audio playback for participants in live, interactive audio events. It guides attendees through humorous, synchronized instructions in public spaces, creating a unique participatory performance art experience. ### How does The Mp3 Experiment app work? Users download a custom audio file and have the app open at the event's start time. The audio then automatically begins playing in sync for all participants, delivering secret instructions from a narrator. ### Is The Mp3 Experiment app free to download? Yes, The Mp3 Experiment app is free to download. It is available for iPhone, iPad, and iPod devices. ### What is the age rating for The Mp3 Experiment app? The Mp3 Experiment app has an age rating of 4+. This indicates it is suitable for a wide audience. ### When was The Mp3 Experiment app last updated? The Mp3 Experiment app was last updated on January 27, 2026, with version 6.0.3. ### What is the user rating for The Mp3 Experiment app? The Mp3 Experiment app has an average rating of 3.8 stars, based on 12 ratings. ### Can I use The Mp3 Experiment app offline? The app itself needs to be open to synchronize audio, but the audio files are downloaded beforehand. The core experience relies on synchronized playback during a live event. ### Where can I find more information about The Mp3 Experiment? More information about The Mp3 Experiment project can be found on their official website: http://mp3experiment.com/ ## Version history (last 5 releases) ### 6.0.6 — 2026-03-30 - improve playback ### 6.0.3 — 2026-01-27 - internal improvements ### 5.0.10 — 2023-06-13 - add manual play option ### 5.0.3 — 2023-06-13 - minor improvements ### 5.0.1 — 2022-06-15 - improved offline playback ## More apps by Improv Everywhere Productions, Inc. - [Surrounding: Improv Everywhere](https://appshunter.io/ios/app/surrounding-improv-everywhere/id1561483144) All apps by Improv Everywhere Productions, Inc.: https://appshunter.io/developer/1141107519 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*