Tieline Technologies

Genie STL

STL IP Audio Without Compromise...

Tieline's Genie STL is the World's most powerful DSP-based IP audio codec for mission critical mono, stereo, dual mono or multipoint studio-to-transmitter links.

Designed for the latest digital IP broadcast networks, Genie STL is the most feature-packed STL-grade IP audio codec with multiple levels of power, audio and network redundancy.

------------ Genie Front Panel

--- Genie STL logo 

Now with Multi-unicast, Multicast, Wi-Fi & Expanded Backup Options!


Genie STL is the world’s most powerful and robust audio codec for mission critical point-to-point connections and studio-to-transmitter links over a range of connection transports, including IP, ISDN and POTS.


Genie STL delivers superior quality audio over IP (AoIP) on LANs, WANs, the internet, satellite IP, cellular, Wi-MAX and Wi-Fi. It is specifically designed for continuous operation over mission critical audio paths throughout broadcast IP networks. It is ideal for:

  • Mono, Stereo and Dual Mono Studio-to-Transmitter Links (STLs)

  • Mono, Stereo and Dual Mono Studio-to-Studio Links.

  • Multi-unicast to up to 10 endpoints.

  • Multicast in mono or stereo to unlimited endpoints over compatible networks.

------------ Multi-unicast x 10

Multiple Backup Options

Genie STL IP codecs have multiple levels of power, audio and network redundancy. The codec features dual Gigabit Ethernet ports, dual internal power supplies, automated audio silence detection and IP network backup solutions to ensure you’re always on the air.

Automated network failure detection provides switching to a backup IP LAN connection. You can also fail over to backup ISDN or POTS connections as required using optional ISDN or POTS modules.

------------ Genie STL with IP and ISDN plus POTS backup

 STL-grade IP Audio with ISDN and POTS Backup

Genie STL can automatically switch between 4 backup audio sources to maintain program output at transmitter sites. Options include:

  • Connection audio.

  • Icecast streaming client.

  • Audio file backup.

  • Hardware bypass of audio inputs to outputs if power fails. 

SmartStream: Rock Solid Audio using Inexpensive IP Links

--------- SmartStream logo

As an IP audio pioneer, Tieline was the first major codec manufacturer to integrate SmartStream features such as Automated Jitter Buffer management, Forward Error Correction (FEC) and error concealment techniques in all IP codecs. These features dynamically respond to variable conditions over unmanaged IP networks like the public internet to ensure reliable streaming.

   --- SmartStream PLUS logo

Now SmartStream PLUS has revolutionised IP broadcasting by delivering the rock solid and reliable STL-grade audio quality you would expect over a T1/E1 link by using inexpensive unmanaged IP networks like the internet for STLs, audio distribution and remotes.

Save Money Now with SmartStream PLUS Redundant Streaming

Some other manufacturers charge thousands of dollars for IP management software like SmartStream PLUS as if it's an optional extra. However Tieline believes high performance and STL-grade rock-solid reliability is an essential part of each and every broadcast, and delivers its renowned SmartStream PLUS as standard in Tieline Genie STL. 

Tieline can show you how an investment in new codecs will pay for itself in just a few months by using SmartStream PLUS over inexpensive IP links to transport STL-grade, high fidelity audio at a fraction of the cost of synchronous leased lines. With SmartStream PLUS:

  1. Stream simultaneous redundant data streams and deliver seamless redundancy by switching back and forth, without loss of audio, from the nominated primary data link to the backup link if one fails and then subsequently recovers. Note: Use IP links from two different IP network providers for optimal redundancy over mission critical STL connections.

  2. When multiple redundant audio streams are sent, the decoding codec automatically reconstructs audio into a perfect single stream on a first packet arrived basis to ensure audio integrity.

Unsurpassed Clarity

Genie STL is capable of 24bit 96kHz low latency linear PCM audio, delivering unsurpassed sonic clarity. The codec also features a full complement of professional algorithms including the low delay and cascade-resilient aptX® Enhanced algorithm, as well as the popular LC-AAC, HE-AAC v1 and v2, AAC-LD, AAC-ELDv1 and v2, Opus, MPEG II, MPEG Layer-3, Tieline Music and MusicPLUS, G.722 and G.711 algorithms.

------------ Genie STL Front Panel Description

Flexibility and Interoperability

  ------ ISDN G5 (Euro) angle

Tieline G5 ISDN module

Tieline Genie STL codecs deliver flexibility by allowing you to connect over ISDN, POTS or IP networks as required. Simply purchase optional ISDN G5 or POTS G5 modules, insert them in the codec and you are ready to connect over ISDN, POTS or IP on demand. Click here to learn more about Tieline ISDN options.

Genie supports both IPv4 and IPv6 (Dual Stack) protocols, so broadcasters can be assured that they have made a smart investment for the future as new networks and technologies emerge over time. Connect over IP with any SIP-enabled IP codec brand that supports the EBU N/ACIP tech 3326 standard, as well as VoIP telephone devices supporting G.711 and G.722.

For more information about Genie STL contact Tieline on sales@tieline.com



  • Robust DSP-based architecture designed for mission critical STL audio.

  • 24 Bit 96kHz audio sampling (32kHz audio quality).

  • Analog and Digital (AES3) inputs and outputs.

  • Bidirectional Mono, Stereo or dual mono connections.

  • Multi-unicast to up to 10 endpoints.

  • Multicast to unlimited endpoints over compatible networks.

  • Uncompressed PCM audio plus the low-delay, cascade resiliant aptX® Enhanced algorithm.

  • Other popular algorithms including LC-AAC, HE-AAC v1 and v2, AAC-LD, AAC-ELDv1 and v2, Opus, MPEG II, MPEG Layer-3, Tieline Music and MusicPLUS, G.722 and G.711.


  • Dual 1 Gigabit (10/100/1000) Ethernet ports support automatic switching for redundancy. 

  • Connect over Wi-Fi using USB Wi-Fi dongles.

  • Primary and backup audio over IP, ISDN* and POTS*.

  • Automated failover to backup connections.

  • Support for up to 4 output audio source fail over options.

  • SmartStream PLUS dual redundant IP streaming: 

  • Fuse-IP network bonding (data aggregation) of Ethernet ports or Ethernet and Wi-Fi.

  • SIP (SDP) compatible with EBU N/ACIP 3326 for interoperability with other codec manufacturers.

  • Deterministic SIP answering and call routing: Configure up to 6 SIP accounts and connect up to 2 SIP interfaces.

  • Compatibility over ISDN with Worldcast, Prodys, Mayah, CDQ Prima, AETA, AEQ, Orban and more.

  • Compatibility over ISDN using aptX Enhanced encoding with Worldcast, Prodys Prontonet and Mayah.

  • Selectable fixed or automatic jitter buffer: 5 automated settings available to manage network connectivity and avoid dropouts (includes configurable min and max buffer settings).

  • Configurable Forward Error Correction (FEC).

  • Highly advanced error concealment strategies.

  • Real-time IP connection packet statistics.

  • Real-time POTS line quality and IP link quality displayed.

  • Support for Line Hunt dialing/answering and caller IDs using Tieline IP.


  • Full hardware front panel interface including navigation, LCD display, PPM meters and dialing key pad.

  • User-friendly HTML5 Toolbox Web-GUI enables codec configuration and control remotely over WANs.

  • Toolbox Scheduler supports loading/unloading, connecting and disconnecting programs.

  • Auto switching, dual redundant internal AC power supplies.

  • IPv4 & IPv6 compatible and ready.

  • Asymmetric algorithmic encode/decode.

  • Integrated alarm management including automatic silence detection.

  • Low latency in-band RS-232 aux data channel.

  • Configurable software rules engine via web-GUI for Control Port (4 inputs/outputs) functions, plus WheatNet-IP LIO compatibility.

  • Upgrade firmware from USB sticks.

  • Backup and restore configuration via USB sticks.

  • Automated firmware upgrade notifications via Web-GUI.

  • Support for multiple languages: English, Spanish, Portuguese and French.

  • Backward compatible with all Tieline IP codecs.


  • User name and password protection of codec and Toolbox Web-GUI.

  • Support for SSL Security Certificate installation.

  • SIP Whitelists and Blacklists allow filtering of SIP URIs and User Agents.

* Modules sold Separately
MPEG Layer-3 audio coding technology licensed from Fraunhofer IIS and Thomson Licensing.


Input/Output Specifications

Analog Inputs

2 x Female XLR line inputs

Analog Outputs

2 x Male XLR


1 x female XLR (Channel 1 in; shared with Ch1 analog input)

AES3 Out

1 x male XLR

Auxiliary Input

1 x 6.35mm (1/4") Mic/Line level Jack on rear panel (15V phantom power available)

Headphones Out/Aux Out

1 x 6.35mm (1/4") Jack on rear panel and 1 x 6.35mm (1/4") Jack on the front panel

Control Port In/Out

Four relay inputs and four opto-isolated outputs for machine control via a DB15 connector.

Input Impedance

High Impedance  > 5K ohm

Output Impedance

<50 ohm Balanced

Clipping Level

+22dBu (input and outputs)

A/D & D/A Converters

24 bit

Frequency Response at 48kHz

20Hz to 22kHz

Frequency Response at 96kHz

20Hz to 32kHz (Analog); 10Hz to 45kHz (AES3 Digital)

THD and Noise (Analog)

<0.0035% at +16dBu or -89dBu unweighted

THD and Noise (Digital)


Analog Signal to Noise

>98.5dB at +22dBu, unweighted

Sample Frequencies

IP Sample Frequencies

16kHz, 32kHz, 44.1kHz, 48kHz, 96kHz



Tieline Music, Tieline MusicPLUS, G.711, G.722, MPEG-1 Layer 2, MP3, LC-AAC, HE-AAC and HE-AACv2, AAC-LD, AAC-ELD, Opus, 16/24 bit aptX Enhanced

IP (uncompressed)

Linear PCM16/24 bit 48/96kHz sampling

Data and Control Interfaces


USB 2.0 Host port on the front panel supports Wi-Fi using a USB Wi-Fi dongle and USB stick firmware upgrades


2 x 10/100/1000 RJ45 connectors

Advanced Networking

VLAN tagging (IEEE 802.1Q,802.1p)


RS232 up to 115kbps with or without CTS/RTS flow control via female DB9 connector, can be used as a proprietary data channel

Protocols supported

Tieline, DHCP, SNMP, DNS, HTTP, IGMP, ICMP, VLAN, IPv4/v6, FEC, SIP/SDP (EBU N/ACIP Tech 3326 compliant), RTP

ISDN via module

Optional via module slot

POTS via module

Optional via module slot

Front Panel Interfaces


256 x 64 monochrome LCD


21 button keypad


5 button keypad




1U x 19" Rackmount


19” x 1.75” x 13.5” [482mm (W) x 44mm (H) x 343mm (D) including rear connectors]


6lb 7.7oz/2.94Kg

Power Consumption

Dual AC 100-240V IEC power inlets; 1A - 50-60Hz

Operating Temp.

0°C to 45°C (32°F to 113°F)

Humidity Operating Range

20% ≤RH ≤70% (0 to 35°C/32°F to 95°F), non-condensing

MPEG Layer-3 audio coding technology licensed from Fraunhofer IIS and Thomson Licensing.