The room’s sound, in every pocket in the room.
Adtie Aura takes the feed straight off your mixing desk and puts it on every phone in the building, 32 milliseconds behind the stage. The same feed goes out to anyone in the world, encrypted, from the same box.
One box in your rack · No receivers to hand out · Nothing for your audience to collect at the door
Everything below is drawn to the same scale.
FULL WIDTH = 200 MS- capture + ring
- encode
- network hop
- jitter buffer
- decode + output
The 32 ms figure is an acoustic round trip — a click played into the room, captured, streamed and measured coming out of a phone speaker. Median of four runs, 26–39.5 ms, default buffer depth. The segment split inside the bar is indicative; the total is measured. The remote figure is the design target for the encrypted relay path and varies with the listener’s connection.
Your room already has great sound. It just doesn’t reach everyone in it.
The back row, the hard-of-hearing, the overflow space, the parent in the foyer, the person who needs the other language — they all hear a worse version of what you spent money making good.
Receivers nobody wants to run
Body-pack FM and infrared kits mean charging, handing out, sanitising and chasing. Most sit in a drawer because the desk that lends them is not always staffed.
Loops that only cover part of the room
Induction loops help the people with the right hearing aid, in the right seats. Everyone else — and every visitor without one — is out of luck.
A stream that arrives seconds late
Standard live streaming buffers for stability, so the audio lands two to ten seconds behind the room. Useful for a recording. Useless for someone sitting in it.
Four stages between the desk and the ear. Here is what happens in each.
The numbers below are positions in the chain, not marketing steps — the audio really does pass through them in this order, and each one costs time we can account for.
- STAGE 01
Capture the desk feed, whole
A multichannel USB interface takes your existing outputs — main L/R, a speech mix, an interpreter booth, whatever you already send somewhere. Adtie Aura reads them all at once, at full rate, and never re-mixes them. What leaves the desk is what reaches the phone.
input · multichannel USB audio
rate · 48 kHz
platform · a hardened operating system
hand-off · lock-free hand-off per channel - STAGE 02
Encode in 2.5-millisecond frames
Each channel gets its own real-time thread that does nothing but encode. It runs a low-delay codec, cut into 2.5 ms frames — short enough that the encoder is never the reason you are behind. There is no garbage collector anywhere near the audio path, so there is no pause to design around.
codec · low-delay codec
frame · 2.5 ms
thread · real-time priority, one per channel
memory · no garbage collector - STAGE 03
Send it twice: once to the room, once to the world
In the building, each listening phone gets its own stream of lightweight datagrams sent straight to it — never broadcast, which is what makes Wi-Fi audio stutter. Off-site, the venue box dials out through an encrypted outbound tunnel to the relay, which seals every packet for that one listener and fans it out. Your firewall never needs an inbound rule.
wire · lightweight datagrams, compact fixed header
on-site · one stream per phone, one port per channel
remote · modern authenticated encryption per session
tunnel · encrypted, venue dials out - STAGE 04
Play it with a buffer the listener can see
The app decodes inside the audio callback and rides a jitter buffer sized for the path it is on: shallow on the venue Wi-Fi, deeper over the internet. The buffer depth, packet counts and losses are on screen, so when someone says “it’s choppy” you get a number instead of an argument.
Android · the platform's low-latency audio path, exclusive stream
iOS · the platform's low-latency audio path
buffer · 2–3 packets on-site, 6–12 remote
replay window · enforced on the client
End of the chain32 msThe 32 ms figure is an acoustic round trip — a click played into the room, captured, streamed and measured coming out of a phone speaker.
The listener never picks a network. The app already knows.
Press Stream. The app probes the venue’s local path first, and falls back to the encrypted relay if it isn’t there. There is no mode switch to explain to an audience.
On the venue Wi-Fi
Packets never leave the building. The phone says hello to the box, the box streams straight back to it, and the buffer sits at two packets.
- Close enough to the room that lip-sync holds
- Works with the internet down
- No per-listener bandwidth leaving your line
- Listeners drop off the box the moment they stop
Anywhere else in the world
The venue dials out to the relay through an encrypted tunnel. Each listener gets their own sealed copy of every packet, keyed to a token that expires.
- Encrypted end to end, per session
- No inbound firewall rule at the venue
- Switch it off per venue, or per person
- Still real-time — a conversation, not a broadcast
Open, tap the venue, press Stream.
Adtie Aura is a real app, not a web page behind a QR code. It keeps playing with the screen off, survives a phone call, reconnects after a drop, and remembers the channels someone listens to every week.
Browse
Every venue the account can reach, badged with how it can be reached right now. New venues appear on their own.
Favorites
Star a channel and it sits one tap from the home screen, kept on the device.
Sticky mini-player
Whatever is playing follows you across every tab, with a stop button that always works.
Honest diagnostics
Buffer depth, packets received, packets lost, mode and relay — refreshed every second.
Light and dark
Follows the system, or pin it. Dark mode matters in a blacked-out auditorium.
Buffer control
Two to twelve packets. Trade latency for stability when the venue’s Wi-Fi is busy.
- 01 Open, tap the venue
- 02 press Stream
One feed was never enough.
A venue rarely has a single audience. Adtie Aura carries every output your desk already produces as a separate channel, and each listener picks the one they need.
Each channel is an independent stream on its own port with its own encoder thread. Adding one does not slow the others down, and a listener on channel 3 never touches the bandwidth of channel 1.
See who is listening. Cut anyone off in one click.
A web console for the people who run the room: live listener counts, the state of every venue box, remote listening on or off, and a block button that takes effect immediately.
| Venue | Channel | Listeners | Path | Streamer |
|---|---|---|---|---|
| The Riverside Hall | Main mix | 142 | On-site | healthy · 0 lost |
| The Riverside Hall | Speech assist | 27 | On-site | healthy · 0 lost |
| Harbour Conference Centre | Interpretation — FR | 31 | Remote | healthy · 0 lost |
| St Alban's Parish Church | Speech assist | 18 | Remote | healthy · 0 lost |
Know the box is fine before anyone asks
Each venue reports its own health — packets flowing, channels up, who is subscribed — straight into the console, over the same tunnel it streams on.
Turn remote listening off per venue
Some events should stay in the room. Flip remote off for a venue and every token request for it is refused, instantly, whatever the app thinks.
Block a device, disable an account
A blocked device is dropped by the venue box itself and its hellos are refused. Disabling an account kills its sessions and its next token in one action.
Same box. Very different rooms.
Houses of worship
Hard-of-hearing members hear the sermon at full clarity from their own seat. The overflow room, the crèche and the housebound get the same feed at the same moment.
Speech assist · overflow · shut-inTheatres & concert halls
Assisted listening without a receiver desk, plus an audio-description channel for the performances that carry one — on the phone already in the pocket.
Assisted listening · audio descriptionConferences & interpretation
One channel per booth. Delegates choose their language on their own phone; you stop renting, distributing and losing receivers for every event.
Multi-language · floor + boothsMuseums & guided tours
A guide talks normally into a headset and a group of forty hears them clearly, without shouting across a gallery or disturbing the next room.
Guide mic · whisper toursStudios, gyms & silent classes
Coach mic and music bed on separate channels, so members set their own balance and the room next door stays quiet.
Coach + music bedSports bars & multi-screen rooms
Six screens, six audio channels. Customers pick the match they are actually watching instead of listening to whichever one won the remote.
One channel per screenLecture halls & training
Students in the back and students at home hear the same lecturer at the same time, close enough to live that questions still work.
In-room + remote cohortAccessibility programmes
A listening option that works with the hearing aids, headphones and earbuds people already own and already know how to use.
Bring your own headphonesA live microphone feed deserves better than a public link.
Everything that leaves the building is sealed to one listener for one session. There is no URL to forward, no stream key to leak, and nothing listening on your public IP.
Sealed per session
Remote audio is encrypted with modern authenticated encryption under a key derived for that one listening session. A packet captured off the wire decrypts for nobody else.
Tokens that expire
Access is a short-lived signed token tied to the account, the venue and the channel. The app renews it while you listen and it dies when you stop.
No inbound rule at the venue
The venue box dials out to the relay. Nothing at your site accepts a connection from the internet, so there is no port for anyone to find.
The room stays optional
Remote listening is a switch you own, per venue. Turn it off and the venue becomes an on-site-only system again, with no code change.
Four things, and one of them is the app.
There is no new cabling to the seats, no receivers to buy, and nothing for the audience to collect on the way in.
- A small dedicated computer in the rack.
Runs a hardened operating system, with the Adtie Aura daemon as a hardened service. - A feed off the desk.
A multichannel USB interface on the outputs you already have. Nothing about your mix changes. - Wi-Fi that reaches the seats.
The same network your guests already use. We size the access points with you before anything is quoted. - The app on the listener’s phone.
Free, on Android and iOS. Your venue appears in it automatically once the box is registered.
- WEEK 0
A site call. We look at your desk outputs, your Wi-Fi coverage and what the audience actually needs to hear.
- WEEK 1
The box arrives configured. It goes in the rack, takes the desk feed, and appears in the console.
One real event as a pilot, with your staff listening on their own phones and watching the numbers.
- WEEK 2
Channels named the way your audience thinks, signage up, remote listening switched on if you want it.
What we measured, and what we are aiming at.
Measured figures come from real acoustic tests on real hardware. Targets are labelled as targets. We would rather you hold us to the difference.
- MEASURED
- TARGET
The questions venues actually ask.
Do our visitors have to install something?
Yes — Adtie Aura is a native app on Android and iOS, because that is what makes 32 ms and screen-off playback possible. A browser tab cannot hold a real-time audio path open the same way. Most venues put a QR code on the seat card or the order of service; the app is free and the venue shows up in it automatically.
Will this survive our Wi-Fi?
It is built for the failure mode that kills most Wi-Fi audio: broadcast traffic. Adtie Aura sends each listening phone its own copy of the stream, which lets the access point retry lost frames instead of dropping them. That is the difference between choppy and clean. Capacity is still bounded by your access points, so we count them with you before anyone signs anything.
How far behind the room is it, really?
32 milliseconds on the venue Wi-Fi, measured as a full acoustic round trip rather than a protocol figure — click played into the room, streamed, and recorded coming out of a phone. Four runs landed between 26 and 39.5 ms. Close enough that watching a stage and listening on a phone stay in sync.
Do we have to open ports on our firewall?
No. The venue box opens an encrypted outbound tunnel to the relay and keeps it up. Nothing at your site accepts an inbound connection from the internet. If you never enable remote listening, the box does not talk to the outside world at all.
Can we stop someone listening?
Three ways, and all of them are immediate. Block a device and the venue box drops it and refuses its next hello. Disable an account and its sessions die with it. Turn remote off for a whole venue and every token request for it is refused, whatever any app has cached.
Does it work with our mixing desk?
If your desk can send a line-level or USB output somewhere, it can send it here. We take the outputs you already produce — main mix, a speech send, an interpreter booth — and carry each one as its own channel. Nothing about your existing mix changes.
Does this satisfy our accessibility obligations?
It is a strong assistive-listening option and it removes most of the reasons people avoid the ones you already have. Whether it satisfies a specific regulation depends on your country and your building, and often on whether a hearing-aid-compatible option must also exist. We will tell you plainly where Adtie Aura fits and where it does not — bring your access consultant to the site call.
What happens when the internet drops?
Everyone in the building keeps listening. The on-site path never leaves your network, so an outage only affects people listening remotely — and the app moves them back to the local path automatically the moment they walk in the door.
Who owns the audio?
You do. Adtie Aura does not record, store or archive the stream anywhere. Packets are forwarded and forgotten; the relay keeps who is connected, not what they heard.
Book your week 0 site call.
Tell us about the room and we will set a date. Bring your access consultant along if accessibility compliance is part of the conversation.
Get the app. Walk into the room. Press Stream.
Adtie Aura is free, and every venue running a box appears in it on its own — no code to type in, nothing to collect at the door. Android is live today; the iOS app is on its way.