Barix STL

Studio Transmitter Link.

The Barix Studio Transmitter Link (STL) Application is a fast and reliable solution to stream audio in full-duplex PCM and half-duplex MP3 from a broadcast studio to a transmitter device in another physical location. RTP over UDP protocol guarantees low latency and strong reliability of the audio stream. The application can stream to eight unicast or multicast destinations, or can send as a broadcast. Several administration tools like keep alive handshake, contact closure tunneling, SNMP traps, Serial gateway, multicast and DNS are supported. The integrated Reflector Server Software simplifies connectivity over the Internet when no fixed external IP address is available. The Barix STL Application is a very powerful and flexible tool for a professional radio distribution.

  • WEB based, “easy to use” configuration
  • Audio formats are going from G.711 (µ/A-law) 8kHz/24kHz mono, over PCM 8kHz mono up to PCM 48kHz stereo and MP3
  • Studio Encoder, Transmitter Decoder, Studio Encoder / Decoder, Transmitter Encoder / Decoder.
  • Up to 8 audio stream destinations
  • Configurable streaming mode: stream on level, stream on contact, stream always
  • Configurable RTP delay on the decoder side
  • Configurable input source, input gain and output level
  • Configurable device relay’s working mode
  • Configurable SNMP or/and SMTP (e-mail) messaging service
  • Configurable COM ports for TCP or UDP based serial gateways
  • Configurable security settings
  • Unidirectional studio-transmitter link can be streamed over firewall employing BRTP protocol
  • Quality of Service (QoS) and (DSCP)
  • fading effect for new connections
  • Local contents backup
  • customizable with BCL

Devices Available for Barix STL

Barix STL Exstreamer 100, 110, 120 (Exstreamer 105 OBSOLETE)

IP Audio decoders for broadcast, interner radio and VoIP applications

  • AACplus, MP3, Ogg Vorbis, G.711, PCM Decoding
  • IP Streaming via TCP, UDP, RTP, Multicast
  • Line Level Output (Stereo)
  • RS-232 Serial Port
  • Optional: Relay Output, IR receiver and Display
  • MicroSD or USB Flash Interface

Ordering numbers for Exstreamer 100, 110, 120 (Exstreamer 105 OBSOLETE)

Exstreamer 100 (Made in China)

2005.9051 Extreamer 100 EU Package

2005.9052 Extreamer 100 US Package

2006.9056 Extreamer 100 NoPSU Package

2006.9057 Extreamer 100 UK Package

Exstreamer 105 (Made in China) OBSOLETE

2011.9109P Extreamer 105 EU Package OBSOLETE

2011.9110P Extreamer 105 US Package OBSOLETE

2011.9111P Exstreamer 105 NoPSU Package OBSOLETE

Exstreamer 105 (Made in China) OBSOLETE

2011.9112P Extreamer 105 UK Package OBSOLETE

Exstreamer 110 (Made in China)

2007.9079 Extreamer 110 EU Package

2007.9080 Extreamer 110 US Package

2007.9083 Extreamer 110 UK Package

2008.9087 Extreamer 110 NoPSU Package

Exstreamer 120 (Made in China)

2010.9100P Extreamer 120 EU Package

2010.9101 Extreamer 120 US Package

2010.9102 Extreamer 120 UK Package

2010.9103 Extreamer 120 NoSPU Package


2006.9072 Wall Mounting Bracket

2007.9082 Barix 19″ Rack mount

2006.9054 Cable Set Audio

2003.9017 IR Kit (Reciever + Remote)

Barix STL Exstreamer 500

Professional Multiprotocol IP Audio de-/encoder with I/O and balanced audio

  • MP3, G.711, PCM Encoding
  • MP3, G.711, PCM, AACplus, Ogg Vorbis Decoding
  • Shoutcast/Icecast Source capability
  • IP Streaming via TCP, UDP, RTP, Multicast
  • Balanced Line Level Input and Output (Stereo)
  • RS-232 / RS-485 Serial Port
  • 4 Relay Outputs
  • 4 Contact Closure Inputs
  • USB Flash Memory Interface

Ordering numbers for Exstreamer 500

  • 2010.9096
    Exstreamer 500 Intl packageDevice, universal power supply, screw terminal connectors, DB9 to XLR adapter cable.
  • 2007.9082 19’’
    Barix Rack mount

Barix STL LX400 Flexa

Stream audio in PCM or OPUS with configurable constant audio delay.


  • Highly efficient, high quality OPUS or AACplus compression
  • Uncompressed PCM streaming
  • Guaranteed end-to-end audio delay (RTP)
  • RTP transmission redundancy
  • Studiohub in/out and AES3 output
  • 8x closure output, send in sync with audio stream or status function
  • No need for fixed IP addresses with Reflector EVO
  • Easy to configure
  • Confidence listening via browser
  • 8x Contact input (for in-sync delivery or streaming control)
  • 8x Relay output
  • RS-232 for Metadata output (v2)
  • Power over Ethernet (PoE) and 24VDC power
  • SNMP support (v2)

Ordering numbers for LX400 Flexa

 2023.9376P LX400 Flexa Package

Barix STL Instreamer Classic

Encoder for analog audio sources in real time with TCP, UDP, Shoutcast, Multicast RTP stream

  • MP3, G.711, G.722, PCM Encoding
  • IP Streaming via TCP, UDP, RTP, Multicast
  • Shoutcast/Icecast Source capability
  • Audio Level Supervision with SNMP Trap generation
  • Line Level Input (Stereo)

Ordering numbers for Instreamer Classic

2012.9121 Instreamer EU Package

2012.9123 Instreamer US Package

2012.9124 Instreamer UK Package

2012.9125 Instreamer noPSU Package

Keep me updated about Barix STL

What Others are Saying about Barix STL

"I chose the Barix Instreamer and Extreamer 110 because of the economical price and functions that I needed. I use this pair as an Studio Transmitter Link for a radio station in Peru, South America. They have been extremely reliable and I especially like the relay contact on the Extreamer. I use it to control a contactor to turn on the transmitter and associated equipment when streaming begins."

Rick Herr (SIL)