FREE EDITION NOW AVAILABLE

Your STL.
Without the hardware.

Replace your Studio-to-Transmitter Link with a lossless WebSocket audio bridge. Any connection. Any distance. Zero hardware costs.

Free Download Free vs Pro
1 RX Connected · 18ms
Float32 · 48kHz · Stereo
AudioLink STL · Studio-to-Transmitter Link
CONNECTED ON AIR
Server
wss://audiolink.soundcast.ca
STUDIO-A
Audio Input
VB-Audio Virtual Cable
● Virtual cable
48 kHz
Stereo
Broadcast
◉ MONITORING
■ END BROADCAST
ON AIR 01:23:47
Stats
Packets
18,432
Sent
847 MB
Bitrate
6.1 Mb/s
Chunk
5.3 ms
LINE IN→ WORKLET→ GAIN→ PCM ENC→ WS TX
SIGNAL MONITOR — ON AIR● ON AIR
L
-8.4
R
-9.2
Event Log
08:14:22Registered — 1 RX online
08:14:23◉ Monitoring — VB-Audio Cable
08:14:25🔴 ON AIR — broadcast started
WS RX→ BUFFER→ PCM DEC→ GAIN→ OUTPUT
OUTPUT MONITOR — PLAYING● LIVE
L
-8.9
R
-9.7
Event Log
08:14:22STUDIO-A transmitting
08:14:2248kHz · Stereo · Float32
08:14:23▶ Playing — 18ms latency
Server
wss://audiolink.soundcast.ca
TRANSMITTER-FM
Output
Default Output
Buffer76%
2048 samples
Playback
■ STOP
Stats
Packets
18,428
Rcvd
845 MB
Latency
18 ms
Loss
0.0%
How it works

Three pieces.
One lossless link.

01

TX — Transmitter

Runs on the studio computer. Captures audio from your mixer or automation software via a virtual audio cable. Streams raw PCM Float32 over a secure WebSocket — no codec, no quality loss.

02

Relay Server

A lightweight Node.js process on any VPS. Routes packets from TX to all connected RX clients instantly. Uses under 35MB RAM and coexists completely with your existing apps.

03

RX — Receiver

Runs at the transmitter site. Receives the stream, applies jitter buffering, and delivers clean audio to your processor or compressor. Under 20ms latency on a local network.

Built for broadcast

Everything a radio station
actually needs.

PCM FLOAT32

Lossless Audio

Raw 32-bit floating point PCM. No codec, no compression. What goes in at the studio comes out at the transmitter bit-for-bit identical.

AUTO-RECONNECT

Auto-Reconnect

Fibonacci backoff reconnection on both TX and RX. Network drops, AudioLink recovers automatically — no manual intervention.

PRE-MONITOR

Pre-Air Monitoring

Check levels before going live. Real-time VU meters, waveform, clip detection, and stereo balance checks all visible before GO LIVE.

SPEED TEST

Network Speed Test

3-phase test measures RTT latency, jitter, throughput, and packet loss. Know in seconds whether your link can carry the stream.

SECURE LOGIN

Login Protected

Password-protected login with TX/RX role selection. Sessions persist permanently — your 24/7 stream is never interrupted.

BROWSER + APP

Browser or Desktop

Works in Chrome as a web app. Build a Windows .exe with Electron — sits in the system tray and auto-starts with Windows.

HTTPS / WSS

Secure by Default

Runs over HTTPS and WSS with Let's Encrypt. Mic permissions remembered permanently by Chrome — no repeated warnings.

NO HARDWARE

Zero Hardware Cost

Replace a Tieline, Barix, or Comrex STL costing thousands with software on a $5/month VPS. Same job. Fraction of the price.

Free vs Pro

Start free.
Scale when ready.

Free EditionPro Edition COMING SOON
Lossless PCM audio✓✓
Auto-reconnect✓✓
Pre-air level monitoring✓✓
Network speed test✓✓
Login protection✓✓
Windows desktop app (.exe)—✓
Self-hosted server✓✓
Hosted relay — we manage everything—✓
Adaptive bitrate (Opus 256 → 128 → 64kbps)—✓
Return audio feed (studio → reporter monitoring)—✓
Multiple simultaneous TX (live reporters)—✓
Station dashboard—✓
SSL included — zero setup—✓
Priority support—✓
PriceFree$29 / month
or $349 one-time
(1 yr updates incl.)
Free Edition

Download.
Deploy in minutes.

Self-host on your own VPS. Edit one config file, run one command, and your studio link is live.
Log into your SoundCast account to download.

AudioLink Free Edition v1.0.0 — Free / MIT Licence
server.jstx.html rx.htmlconfig.json README.mdNode.js required Windows · macOS · Linux
Checking your SoundCast account…

Download is ready

Your free edition download is below. Check the README inside the ZIP for full setup instructions.

↓ Download AudioLink Free v1.0.0
01

Install Node.js

Download Node.js 20 LTS from nodejs.org on your VPS.

02

Edit config.json

Set your username, password, and station_name.

03

Install & Start

Run npm install ws then node server.js or PM2.

04

Open & Broadcast

Open /tx studio, /rx destination — log in and go live.

Pro Edition

Hosted. Managed.
Just broadcast.

Private hosted relay, adaptive bitrate, station dashboard, SSL included, and direct support.
$29 / month or $349 one-time (includes 1 year of updates · renew at $79/yr)

Lossless PCM audio
Under 20ms latency
Adaptive bitrate
Windows + Browser
Auto-reconnect
Network speed test
License protected
No hardware needed
You're on the list.