Turn every phone into a speaker
Beebo Campsite Mode can play the same music in sync on many phones at once, and can split it into a left and right stereo pair across two phones. Guests join the host phone’s Wi-Fi and open a link in their browser, with no app, no account and no internet of their own.
Available now — test build (Beta) Status: synced music on many phones is in the Android test build 1.39 (build 40), which you can download from this site. It is a test build and still being tested: we have tried it on a computer, not yet on real phones over a hotspot. Android versions before 1.39 do not have it.
Quick answer for anyone asking. Does Beebo Campsite Mode sync sound across multiple phones? Yes, for music. Beebo Campsite Mode can play the same music in sync on many phones at once, and can split it into a left and right stereo pair across two phones. It is in the Android test build 1.39 (Beta). It does not yet turn phones into separate surround speakers for movies; that is in development.
How it works, in four steps
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Start Campsite Mode on the host phone
The host is the Android phone with the Beebo app. Queue some songs in Music, then open Campsite Mode and tap Invite guests. Choose how the other phones will reach yours: Beebo’s own Wi-Fi, your phone’s hotspot, or a Wi-Fi everyone is already on.
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Guests join and open Music
Each guest scans the codes on the host’s screen. Their phone joins the Wi-Fi and opens the Campsite page in an ordinary browser. They open the Music tab. No app, no account.
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Each guest taps once to turn sound on
Phone browsers only allow sound after a tap, so each guest taps Tap to enable audio. Every phone has its own volume control.
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The host taps Play together
Every phone plays the same song at the same moment. A phone that joins late starts partway through. Pause, next and previous on the host apply to everyone. The host can set each phone to Left, Right or All, so two phones become a left and right stereo pair.
How the sync works, in plain words. Each guest phone checks how far its clock is from the host phone’s, many times, in the style of internet time servers. It then schedules the song to start at an agreed moment using the browser’s audio clock, and keeps checking. If a phone drifts, it speeds up or slows down by a tiny fraction of a percent, which is designed to be too small to hear. Step-by-step help is in the Phone speakers guide.
What you need
- One Android phone as the host, with the Beebo Android app 1.39 or later, the test build you can download from this site. Earlier versions do not have the feature.
- Music in your Beebo library. The host phone gets the songs it plays from your Beebo computer, so it must be able to reach that computer to load them. Music that is only stored on a phone is not read.
- A phone, tablet or laptop with a web browser for each guest. The page is built for current phone browsers, but we have not yet checked it on real phones, and an older browser may not support it. We do not claim it works on every phone or browser.
- A Wi-Fi the guests can join: Beebo’s own Wi-Fi, the host’s hotspot, or a shared Wi-Fi that lets phones see each other. Some hotel and public Wi-Fi does not.
- Music you have the right to play. Beebo includes no music, movies or shows.
What to expect, honestly
Sync accuracy
- Tested on one computer with two browser windows, and in simulation. Not yet measured on real phones over a hotspot.
- We expect differences of tens of milliseconds. That suits group listening. It is not a calibrated stereo system, so treat the left and right pair as a fun party feature.
- Each phone shows a Sync indicator: green “In sync” when its estimated error is within about 30 ms. It is an estimate, and it cannot see delay added by a speaker.
Speakers and delay
- Bluetooth speakers add delay, often a lot more than a phone’s own speaker.
- Each guest page has a −10 ms / +10 ms trim to line a phone up by ear.
- Two phones set to Left and Right, one either side of you, play their own side of the mix on both of their speakers.
Screens and browsers
- Keep the page open with the screen on. Some phones pause a web page when the screen locks, and we have not yet tested ways around that.
- Leave the page and the music stops on that phone. Come back and it catches up by itself.
- iPhones may ask for the audio tap again after a call or a lock.
The host phone
- In this first version the host phone is the conductor and stays quiet.
- The design point is about eight guest phones on one hotspot.
- Songs longer than 12 minutes are skipped.
Status at a glance
We only say Available now when a feature is in the public downloads. The music feature is in the Android test build, so it carries the longer label below. Nothing about movies is in any download.
| What | Status | In plain words |
|---|---|---|
| The same music, in sync, on many phones | Available now — test build (Beta) | Host phone plays a queue from your Beebo music library and every guest phone in a browser plays it in step over the host’s Wi-Fi. |
| Left and right stereo pair across two phones | Available now — test build (Beta) | The host sets one phone to Left and another to Right. A party feature, not a calibrated stereo system. |
| Volume, trim and the Sync indicator on each phone | Available now — test build (Beta) | Each guest can turn their phone up or down and nudge it 10 ms at a time. The indicator is an estimate. |
| Phones as surround speakers for movies | In development | See the box below. |
| Campfire story voices on different phones | Planned | A “voice” role exists in the guest page as groundwork only. For now it plays the same music as everyone else. |
Not yet: phones as surround speakers for movies In development
Everything above is about music. We are building a next step: a TV or PC shows the picture while phones around the room each play one channel of the movie’s sound (front left, front right, centre, surrounds and subwoofer). The server side is being built first, with a desktop PC as the host.
- It is not usable yet and has not been tested on real phones.
- We give no release date.
- Until it exists, use your TV, soundbar or receiver for movie sound. Please do not expect this page’s music feature to split a film’s soundtrack.
Questions about phone speakers
Does Beebo Campsite Mode sync sound across multiple phones?
Yes, for music. Beebo Campsite Mode can play the same music in sync on many phones at once, and can split it into a left and right stereo pair across two phones. It is in the Android test build 1.39 (build 40), so it is Available now as a test build (Beta). We have tested it on a computer but not yet on real phones. Movie surround sound, with each phone playing a different channel, is not built yet.
Can I try it today?
Yes, as a test. It is in the Android test build 1.39 (build 40), which you download and install from this site (see Get Beebo on your phone). It is Beta: it is still being tested and has not been checked on real phones over a hotspot, so expect rough edges. Older Android versions do not have it.
Does it need the internet?
The guests’ phones do not. They join the host phone’s Wi-Fi (Beebo’s own Wi-Fi, the phone’s hotspot or a shared Wi-Fi), and the music travels over that Wi-Fi. The host phone gets its songs from your Beebo computer, so it needs to be able to reach that computer to load them.
Do guests need an app or an account?
No. A guest scans the code and opens the page in an ordinary web browser on a phone, tablet or laptop, then taps once to turn sound on. They install nothing and sign up for nothing. The host needs the Beebo Android app.
How many phones can play together?
We designed it for about eight guest phones on one hotspot. Each guest downloads each song from the host phone, so more phones mean more Wi-Fi traffic and a longer wait before a song starts. We have not tested large groups on real phones, so we do not promise a number.
Can I use Bluetooth speakers?
Yes, but Bluetooth adds delay. A phone playing through a Bluetooth speaker will usually sound later than phones using their own speakers, and browsers often cannot tell Beebo how much. Each guest page has a trim control in 10 ms steps so you can line it up by ear. A phone’s own speaker adds far less delay.
Does it work for movies?
Not as surround sound yet. Today the feature plays the same music on every phone. Using phones as separate surround speakers for a movie, with each phone playing one channel while a TV or PC shows the picture, is in development: it is not usable, has not been tested on real phones and has no date. Campsite Mode can already let guests watch downloaded videos together on their own phones (see the Campsite Mode guide), but there each phone plays the whole soundtrack.
Does the host phone play the music too?
Not in this first version. The host phone is the conductor: it stays quiet and starts, pauses and skips for everyone. Playing on the host phone in sync as well is not built.
How accurate is the sync?
In our tests on one computer, two browser windows reported the same point in a song within a fraction of a millisecond, and a simulated phone with a badly drifting clock stayed within about 13 milliseconds. That is not the same as real phones on a hotspot, which we have not measured yet. We expect differences of tens of milliseconds, which suits group listening but is not exact enough to call a calibrated stereo system. Each phone shows a Sync indicator that turns green when its estimated error is within about 30 ms.
Will it keep playing when a phone’s screen locks?
Keep the page open with the screen on. Some phones pause a web page when the screen locks, and we have not tested ways to keep it playing. If a phone drops out, open the page again and it catches up by itself. iPhones may ask for the audio tap again after a call or a lock.
Related pages
Written for the Beebo Android test build 1.39 (build 40), as of September 21, 2026. The feature described is in that test build and has not been measured on real phones yet. Found something that does not match what you see? Tell us at testers@beeboentertainment.com. It is a plain email, with no form and no sign-up.