S T L - I P - 1 6
and
S T L - I P - 8

AudioTX STL-IP-16 and STL-IP-8 provide for live audio transmission over IP networks with transmission grade audio quality & robustness and extremely low delays - as low as 5ms!

AudioTX STL-IP-16 acts as a sophisticated IP Audio Multiplexer. You can setup the system to use multiple ‘TX Channels’ (up to 20), each of which will send live audio from any of the inputs to one or more remote destinations. If you wish, you can send the same audio to multiple destinations, using the same or different audio formats (mono/stereo, compression settings etc) and whether using multicast or multiple point-to-point (unicast) connections. The RX Channels allow you to receive multiple audio channels from remote locations, limited only by the 16 (or 8) physical outputs on the unit.

• Up to 16 audio inputs and outputs. Choice of Professional Balanced Analog or AES digital inputs and outputs.
• Each input (mono, or paired stereo inputs) can be treated as a separate TX channel and can be sent separately to one or more remote units. Multiple audio channels can be sent between devices in a single connection and optionally with Syncho-Lock guaranteeing sample level timing accuracy between channels for applications such as 5.1 or 7.1 surround etc.
• RX channels can be received from multiple remote units simultaneously and output on separate audio outputs.
• IP Codec for live audio: Transmit and receive audio using point-to-point UDP or TCP/IP, and point-to-multipoint UDP Multicast network protocols over ANY IP Network - including private networks (LAN/WAN), Satellite, Wireless networks, T1/E1, ATM or the Internet.
• Each TX channel can transmit audio on up to six simultaneous connections, each using different network protocols if required. Using Multicast, audio can be sent to an unlimited number of destination units. Audio is received independently from transmission.
• AudioTX STL –IP works with Linear (Uncompressed) PCM audio at up to 24 bits and 96kHz sample rate, or compressed audio via built-in Professional Grade MPEG Layer 2 or MPEG Layer 3 coding/decoding, J.41, DAT12, G.722 or our extra Low-Bitrate speech codec.
• MPEG4 AAC, AAC Low-Delay and HE-AAC v2 with the AAC Coding Pack for Stereo audio from just 14kbps!
• 16 and 24 bit Enhanced APTx coding with the APTx Codec Pack.
• Selectable Forward Error Correction (FEC) and network jitter compensation where required.
• Synchronous transmission of serial ancillary data and/or contact closures (TTL & GPIO).
• Built-in silence and audio overload detectors.
• Monitor and control via web-browser control interface, SNMP traps and queries, E-mail alerts, Telnet style IP remote control interface (using simple text commands and responses), included software and logic level status outputs.
• Compatibility between AudioTX STL-IP-16, STL-IP-8, STL-IP Plus and STL-IP Classic units allows you to build a flexible system taking account of the needs of each location or site in your 'audio network'. Also compatible with the STL-IP Connect software, so can be used as a head-end unit accepting up to 16 remote connections from the field.
• Incredibly flexible and cost-effective solution.

The AudioTX STL-IP range can send live audio using any combination of UDP, TCP/IP or UDP Multicast (to an unlimited number of destinations for each UDP Multicast connection). The IP Codec system can receive audio from one location.

Summary:

Detailed specification:

Linear (uncompressed) audio:

MPEG4 HE-AAC and HE-AAC v2:
(High Efficiency AAC, AACPlus):

User-selectable channel inputs to audio transmission modules - Left channel, Right Channel, Stereo or MonoMix (L+R).

Supports all IP networks including Telco, MPLS, Private/Dedicated circuits, LAN/WAN, Satellite, Wireless (incl. WiFi), ATM, T1/E1 and The Internet for IP codec operation.

Network modes: UDP, TCP/IP, UDP Multicast modes

Audio transmit/receive bitrates between 24 kB/s and 4.6 mB/s per audio channel.

Optional transmission of ancillary serial data at up to 57600 bps, up to 4 in / 4 out GPIO (contact closures)

Optional use of FEC (forward error correction) and/or network jitter compensation/safety buffer configurable in 1ms increments from zero to 5 seconds per audio channel

Monitoring and control via:

• Web-browser control interface
• SNMP traps and queries
• E-mail alerts
• Telnet style IP remote control interface (using simple text commands and responses)
• Included software
• Logic level (TTL) status outputs

Built-in silence and audio overload detectors.

Analog audio inputs:

Neutrik Ethercon RJ45 connector, accepts standard RJ45 connector or locking Ethercon cable.

AC Power:

96-264 VAC, 50-60Hz autosensing for worldwide operation.