How do I play music on several devices at once?

Install Allsono on every device, make one the source and choose "Use as speaker" next to the others. Allsono sends the sound over your Wi-Fi and keeps every device exactly in time.

Does Allsono work with Spotify?

Yes, with a Mac as the source: Spotify, YouTube, podcasts and other apps all share their sound. On Android, Spotify doesn't let other apps capture its sound; Allsono then tells you and keeps the sound on the phone itself. Send Spotify to your Mac with Spotify Connect instead and make the Mac the source. YouTube, YouTube Music and most other apps do work on Android. On iPhone, Apple Music can't be shared.

Can my iPhone be the source?

Yes, with one limit set by Apple: iOS doesn't let any app delay or mute the sound of other apps. All speakers then play exactly together, but the iPhone itself runs slightly ahead. Have a Mac? Then make the Mac the source: everything plays exactly together. With Spotify Connect or AirPlay you can still control the music on the Mac from your iPhone. Without a Mac, turn the iPhone itself down.

What about delay or echo?

All speakers play the same fragment at the same moment, within a few milliseconds on a good Wi-Fi network. Only an iPhone that is itself the source runs slightly ahead (see above). Allsono also measures and compensates for the delay of Bluetooth and AirPlay speakers.

The sound only travels over your own Wi-Fi network. Internet is only needed to sign in and check your subscription daily; offline, Allsono keeps working for up to three days.

Which devices does Allsono support?

Macs with macOS 14.2 or later, Android phones with Android 10 or later and iPhones with iOS 17 or later. You can mix them freely.

What does Allsono cost?

Nothing. Allsono is in beta and free: create an account and use the apps on all your devices. If that ever changes, we will let you know well in advance.

How to play music on multiple devices at once

Updated 29 October 2026

The same song in the living room and the kitchen, or a few phones together for a fuller sound at a party: it sounds simple, but press play on two devices at once and within a minute you hear an echo. Here is why, what your options are and how to do it with Allsono.

Why two devices drift apart

Every device has its own clock and its own buffer. Start the same song on two phones and they already begin a fraction apart, and their clocks also run at slightly different speeds. After a while they are tens of milliseconds apart, and you hear that as an echo.

Bluetooth makes it harder: a Bluetooth speaker often plays more than a hundred milliseconds later than the device it is connected to, and that differs per speaker.

Your options

Bluetooth: one phone usually plays on one speaker. Some brands can link their own speakers, but only within that brand.
AirPlay 2: works well between Apple devices and AirPlay speakers. Phones can't be AirPlay speakers themselves, and Android isn't part of it.
A speaker system such as Sonos: plays nicely in sync in every room, but only on that system's speakers, which you have to buy first.
An app such as Allsono: uses the devices you already own (Mac, Android phones and iPhones, mixed freely) and keeps them exactly together over your Wi-Fi.

How to do it with Allsono

Install Allsono on every device that should play along and sign in with your account.
Make sure every device is on the same Wi-Fi network. They then find each other by themselves.
Make the device that plays your music the source.
On the source, tap "Use as speaker" next to the other devices, or tap "Listen along" on another device. Within seconds they play in sync.

Tips for the best result

Prefer a Mac as the source: then everything plays exactly together, the Mac included. An iPhone as the source runs slightly ahead itself, because iOS doesn't let apps delay other apps' sound. Turn that iPhone down.
A stable Wi-Fi network helps. Allsono adapts its buffer to the network; on a calm network the delay is smallest.
If a Bluetooth or AirPlay speaker is connected to a device, Allsono measures that delay and accounts for it.

Try it yourself
Allsono is in beta and free for Mac, Android and iPhone.

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