The APT IP ENCODER Silver and IP DECODER Silver (formerly known as Stream-In/Stream-Out Silver) combine to enable affordable yet professional delivery of audio content over IP networks. Low on cost but rich in features, these units are perfect for standard broadcast applications such as STLs. 

Despite being one of the lowest cost solutions in the market,  they feature the renowned aptX Enhanced coding as well as linear audio as standard. The APT IP Silver devices also support SureStream for increased reliability. 


Audemat ScriptEasy Powerful Performance

  • Reliable and robust encoding/decoding of audio over IP networks
  • Standard algorithms include professional aptX Enhanced & linear audio plus MPEG 2/4 HE-AAC v1/2 coding
  • AUX data transmission, bi-directional on Encoder and Decoder
  • Auto-Detection of received audio format (Decoder)
  • Robust DSP-based platform for mission-critical operation


Audemat ScriptEasy Powerful Control

  • Intuitive web-based browser control
  • Supports Dynamic DNS for global accessibility by hostname rather than IP address
  • Supports UPnP IGD protocol for configuration of UPnP enabled Internet gateways
  • Distributed Intelligence powered by ScriptEasy
  • Supports SNMP monitoring


Audemat ScriptEasy Powerful Savings

  • Extremely affordable with no compromise to quality
  • Features APT’s revolutionary SureStream technology for seamless, broadcast-grade audio over public IP links
  • UDP stream forwarding of audio and non-audio data, bidirectional on Encoder and Decoder
  • Support of virtual IP interfaces for easy multi-network integration


  • Low cost separate encoder and decoder
  • SureStream technology as standard
  • Virtual IP port extensions and VLAN
  • Professional range of algorithms as standard
  • Compact 1/2U design – fit two units in 1U rack space 
  • Compatible with APT & NACIP-compliant codecs
  • Dynamic DNS Client
  • Bi-directional UDP stream forwarding on Encoder and Decoder
  • UPnP Support for NAT gateway configuration
  • Net security features by firewall capability
  • Intuitive web interface
  • Quiet, no-fan operatio
  • Reliable DSP-based architecture


IP Silver Unit status Page
Status Page
IP Silver Unit Performance MonitorPerformance Monitor

SureStream for Broadcast Quality Audio over IP

SureStream technology is a revolutionary innovation from APT that enables broadcasters to use inexpensive IP links and still maintain professional broadcast-grade audio quality and reliability.

It delivers the audio quality and reliability you expect from a T1/E1 link at a fraction of the associated cost. APT SureStream Technology also offers the added benefit of «Always-On Redundancy». With APT SureStream Technology, you can save thousands on your audio transport bills and still offer your listeners the highest quality sound. 

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Advanced Telemetry & Remote Control with ScriptEasy

ScriptEasy is the revolutionary facility control software developed by WorldCast Systems to give users the power and flexibility to create “Smart” sites; ones that can automatically take action to correct any critical errors that affect operations.

Featuring an intuitive Graphic User Interface (GUI), ScriptEasy incorporates GPIO functions, serial communications, logic operators, live user inputs, timers and more. This allows the site operations to be “scripted”, to allow evaluation of multiple parameters and even automatically engage backup systems, while simultaneously alerting relevant technical personnel.

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Connect with WorldCast Manager

The WorldCast Manager  simplifies the management of all SNMP-enabled devices in a network, providing real-time status, historical data and visualization of multiple devices from a single screen. The intuitive and simple-to-use interface shows all devices located at your site(s) displaying product information, alerting you to any alarms and providing one-click access to the unit’s web-based control interface.

The WorldCast Manager is compatible with all WorldCast Systems’ equipment as well as SNMP devices from ANY manufacturer.

logo WorldCast Manager

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WorldCast Manager


The APT IP Silver units can be used in wide-range of applications within broadcast and other industries. Running SureStream on a single link between the two devices increases the reliability and resilience of the connection. 

  • Studio Transmitter Links
  • Confidence Monitoring
  • Commercial IP audio distribution
  • IP music distribution systems in hotels, hospitals, campuses etc..
  • In-store audio distribution applications
Single Port Configuration
user report

User report

«The IP Silvers enable our customers to utilize datalinks that are very low cost and very high quality and, for an initial outlay that is nearly half that of the previous solution.»
Marius Marin, Owner and CEO of Laet Exim, Romania


Current Version: 3.0

See all the specifications in the brochure.

Order information

Hardware Options
SPP00015Rack Mounting Kit for APT IP Silver



  • Conformity certificate - APT IP DECODER Silver

    Published on Nov 6, 2019
  • Conformity certificate - APT IP ENCODER Silver

    Published on Nov 6, 2019
  • Conformity certificate - APT IP DECODER Silver

    Published on Nov 6, 2019



    Published on Feb 4, 2020
  • APT SureStream technology

    Published on Feb 15, 2017
  • AUDEMAT ScriptEasy

    Published on May 30, 2017

Quick Start Guides

  • APT IP SILVER - Quick Start

    Published on Mar 17, 2017


  • APT IP Silver - Manual

    Published on May 25, 2018
  • ScriptEasy - Manual

    Published on Mar 22, 2018


  • WorldNet NMS Software

    Published on Nov 5, 2018


  • WorldCast Systems Overview

    Published on Oct 1, 2019
  • The Essential Guide To Audio Over IP for Broadcasters

    Published on Feb 22, 2018

Press Kit

  • WorldCast Systems Logo - Press Kit

    Published on Sep 16, 2019
  • APT IP Silver - Press Kit

    Published on Feb 16, 2017