APT ­IP Silver

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APT ­IP Silver


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.


  •  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
  • 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
  • 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 operation
  • Reliable DSP-based architecture



EthernetEthernet port, RJ45 for management and streaming
Virtual NetworkVirtual Interfaces and VLAN tagging
Analog I/OElectronically balanced, capacitive isolated XLR for Left/Right, Imp. Hi/Lo and 600 Ω
Serial Aux Data9 pin D Type, RS232 level
USB (Decoder)5VDC supply of ext. equipment
PSU ConnectorDC power supply connector with locking capability for ext. PSU
ManagementWeb GUI, APT NMS, SNMP, XML API (available with a later release)
Input/OutputInput (Encoder) +24dBu / Output (Decoder) +24dBu
Audio Bandwidth10Hz to 20kHz mono & stereo
Standard Coding AlgorithmsEnhanced apt-X 16 & 24 Bit, Linear PCM 16 & 24 Bit, MPEG2/4 HE-AAC v1/v2
Coding Delaymin. 2ms on Eapt-X and higher depending on chosen algorithm
Signal Processing24Bit
Network and IP
IP Protocols SupportedRTP/UDP/IP, RTCP, DNS, Dynamic DNS, DHCP, ICMP, IGMP, VLAN#, UPnP (IGD), NTP, SNMP, SMTP, HTTPS (management)
IP StatisticsComplete IP Statistics for each stream
Casting ModesUnicast, multiple unicast, multicast, multi- multicast
De-Jitter Buffer (Decoder)Buffer size 5 - 5,000ms adjustable, automatic packets re-sequencer
RTP/UPD Streaming and ModesStereo audio multiple Tx-Streams, UDP stream forwarding (duplex), Auto-Detection of received Stream, Auto-Reply to sender (Decoder)
Quality of ServiceDiffServ, with separate DSCP values per stream, SureStream Technology* and Error Concealment
Network SecurityService Filter and Firewall Features
Serial Data Rates (embedded)1200, 2400, 4800, 9600 Baud
Serial Data Rates via IP1200 - 115,200 Baud (8 rates)
AUX Data via UDPUDP forwarding PAD or private Data
Physical specification
External Dimensions (H / W / L)44mm x 220mm x 160mm ; 1.73” x 8.66” x 6.3”
Weight< 1,5 kg - 3.355 lbs
Power Supply ext.100-240VAC 50-60Hz, 12VDC (wall-mount)
Power Consumption< 10W
Guaranteed Working Temperatures0°C - +45°C
HumidityUp to 95% relative humidity (non-condensing)