Synchronized playback : your files, listened to together at the same moment

Send your audio files with Explore mode, share the link: everyone listens at the same moment on their phone, in the same room or each at home. No app, no account for listeners.

Everything starts with an Explore mode link

Send your audio files, or an m3u playlist, with Explore mode, enabled by default on compatible transfers. When the link opens, they form a playlist, and the Synchronized playback button appears in the player.

How to use it?

First an Explore transfer with an audio playlist. Then four steps for the same sound at the same moment.

01

Open the same Explore link

Send an audio playlist in Explore mode, then open the same FileVert link on each device (phone, tablet, computer).

02

Start synchronized playback

On the device you keep in hand, tap 'Synchronized playback'. It leads playback.

03

Join

On the others, tap 'Join' in the banner. They align to the same second.

04

Adjust each output

Speaker, headphones or Bluetooth speaker: each device compensates for its own delay.

Why this feature?

Because the best device for listening is often the one you already have.

Listening together is complicated

Playing the same music on multiple devices almost always requires an app, an account, or speakers from the same brand. Bluetooth limited to one or two speakers. Closed ecosystems by brand. An app and account on each phone. Old devices set aside for lack of compatibility.

Our solution: play together from the link

Your files are sent to FileVert, then deleted after 2 to 15 days. During playback, each device reads its local copy: only synchronization commands go through our servers.

Concrete benefits

Together, at the same instant, with what you already have.

Same sound, same second

Each device schedules playback in advance and realigns itself if it drifts.

One device in control

Play, pause, next track: the others follow automatically.

Each with its own volume

Lower one device without touching the others.

Second life for devices

An old phone becomes a speaker, without buying anything.

Reuse: the real low-impact move

Most of a device’s footprint comes from manufacturing. Putting a phone that sits in a drawer back to work avoids buying another speaker. And when a device truly reaches end of life, the FileVert reuse map helps you find where to donate, repair or recycle nearby.

Open the FileVert reuse map

Listen together, keep your settings

Without accountSubscription
Multi-device listeningYesYes
Latency settingsOn the deviceSaved

Listeners never need an account.

Save your outputs

With a FileVert subscription or during the trial, adjust a speaker or headphone delay, save and name the output. Next time you listen, your latency settings are ready.

Frequently asked questions

Everything you need to know about synchronized playback

Do I need to install an app?

No. Everything happens in the browser, on iPhone, Android and computer.

Do listeners need to create an account?

No. They open the link and tap Join.

How many devices can listen together?

Up to 5 devices in a single playback session. Multi-room possible. Listeners never need an account.

Is playback truly synchronized?

Yes. Each device syncs its clock with the server and schedules playback ahead. If a device lags, it catches up automatically.

What about Bluetooth speakers or headphones?

Bluetooth adds a slight delay. Choose Bluetooth in that device's output setting, or fine-tune with the slider.

Can we listen together remotely?

Yes. Synchronization works across devices in different locations.

Which files can we listen to?

Audio files from your transfer: MP3, WAV, FLAC, m4a, ogg. Synchronized playback plays your files, not a streaming service.

Is it free?

Yes. With a FileVert subscription or during the trial, you can also save your latency settings.

Can I save my speaker settings?

Yes, with a FileVert subscription or during the trial. Adjust the delay, save and name the output. You'll find it next time you listen, with your latency settings ready.

Why must I tap Join on each device?

Browsers require a user gesture before playing sound. This gesture also preloads files.

What if the leading device closes?

Others show Resuming for 10 seconds. If it returns in time, playback continues, otherwise it stops and anyone can restart.

Can we listen to something other than music?

Yes. Podcasts, audiobooks, children's stories, personal recordings: synchronized playback plays all your audio files.
Strategic Impact

Challenges solved by this feature

This feature directly addresses these strategic challenges:

Critical Challenge

Dormant devices & renewal

Unused terminals, early renewal: reuse matters as much as the cloud.

Market Impact
Arcep 2025 : forte présence d'appareils encore fonctionnels non utilisés
ADEME : la phase fabrication domine l'empreinte d'un smartphone
Analyze this challenge
Critical Challenge

Exponential growth digital carbon footprint

Digital carbon footprint: +9% per year. Data centers 2026 = doubling consumption (equivalent Sweden/Germany). Generative AI ×10 consumption. Streaming 82% traffic. Measured FileVert alternative.

Market Impact
Digital carbon footprint: +9% per year
Data centers 2026 = doubling consumption (equivalent Sweden/Germany)
Analyze this challenge
Critical Challenge

Complexity in creative collaboration

Creative teams waste precious time with unsuitable tools that complicate review, versioning and validation of visual content.

Market Impact
67% of creative time lost in chaotic reviews
Creative productivity divided by 3
Analyze this challenge
Practical guides

Related guides

Practical guides to help you use this feature

Guide

Ephemeral audio playlist

Guide: audio playlist, Explore mode

Read the guide
Guide

Old phones as speakers

Reuse old phones as speakers via FileVert synchronized playback.

Read the guide
Guide

Listen together with a client

Listen to a mix with a client remotely, each at home, in sync.

Read the guide

Ready to listen together?

Send your playlist and open the link on all your devices. Same sound, same second, no app.

Send a playlist