ALLOICAside
Start a screen

Picture there.
Sound here.

Start a screen

Already watching one? Type the four letters on it.

Aside plays any screen silent and sends the sound to each person's own phone or headphones, in step with the picture. Nothing to install.

The TV plays a film with no sound. In its corner, a white card with a square code and the room code HZKF.
The TV plays it silent and shows its code.
A phone in room HZKF playing the film's sound: In step, 5 ms early, on a meter centred on zero.
Your phone scans it and plays the sound, held to the picture.

Try it on this page

The screen, silent

Sound against picture

0 mssound off

Sound off
250 ms late0250 ms early
Playing at
100.0%
Jumps so far
0
Jumps aim ahead
0 ms

This page is doing both jobs. The picture has no sound track; the tick is a second file, held against the flash and measured as it plays. On a real screen that second file plays on your phone.

Where it earns its place

Night, over a mother's shoulder: she wears headphones, her daughter asleep against her, Aside on her phone showing In step. The TV plays a drama with its code in the corner.

The late film

She is asleep on your shoulder. The TV stays silent; the film stays loud, in your ears.

The tools

The line-up

Tap along to a flash, then to a tick. Aside works out how late your headphones are and corrects it for you.

Headphone memory

Every pair is late by its own amount. Name them once and the right delay comes back when you pick them.

The sync meter

A live reading, in milliseconds, of where your sound sits against the picture.

A room code

Four letters and a square code on the screen. Scan it and you are in. No app, no account.

The remote

Pause and skip from your seat. Whoever runs the screen can take the remote back.

Cast and AirPlay

Send the picture to a TV from Chrome or Safari. The sound stays on the phone in your hand.

What it plays