Home Production & Sound Cards LX-IP Synchronous AoIP & MADI Multichannel Sound Card
  • Overview
  • Specifications

LX-IP Synchronous AoIP & MADI Multichannel Sound Card

Key Workflow: Bridges professional audio software applications to the ultra-low latency, phase-accurate and high precision clock management of AES67 and RAVENNA AoIP networks

LX-IP provides the perfect gateway from mission critical applications to RAVENNA and AES67 AoIP networks. Its 64 channels, 0.5 ms latency and phase accuracy match all requirements for high density, ultra-low latency on-air or production studio workflows. Hardware-based architecture maintains performance regardless of the computational load of other applications running on the host system.

LX-IP with MADI optional interface provides a seamless migration path from legacy digital audio to AoIP and provides all MADI features described below.

At a glance

The LX-IP sound cards provide:

  • High channel count, ultra-low latency and phase-accurate audio distribution on synchronous AoIP networks
  • Phase-accurate clock synchronization between digital audio and AoIP networks
  • Interoperability with traditional digital audio
  • Performance & stability independent of PC applications
  • Mission critical reliability
  • Play/record 64 audio channels between a DAW (Digital Audio Workstation) or automation application and AES67 or RAVENNA synchronous AoIP network
  • Play/record 64 channels between a DAW or automation application and digital audio MADI equipment
  • Provides zero-latency routing on-board between 2*64 RAVENNA/AES67 channels, 64 DAW channels and (option) 64 MADI channels
  • Provides PTP Grand Master clock to synchronous AES67 or RAVENNA AoIP network. This Grand Master can be slaved to WordClock or MADI inputs
  • Synchronises RAVENNA/AES67 AoIP streams on external PTP clock. The MADI output and WordClock clocks can be slaved to the external PTP clock

Key features

  • 64/64 Record/Play channels on PCIe bus
  • 64/64 AES67/RAVENNA I/O channels on each of the two Gigabit Ethernet interfaces
  • 64/64 I/O MADI (AES10) optical channels (option)
  • Ultra-low sub-millisecond round trip latency
  • Fully compliant with AES67 interoperability recommendations, including Unicast SIP support
  • Packet size from 128 down to 1 audio sample per RAVENNA packet
  • Local clock eligible as PTP Grand Master
  • Zero delay embedded routing matrix for AoIP / MADI / PC channels
  • Performance maintained regardless of the computational load of applications running on the host system
  • Fully configurable through Web user interface and EMBER+ protocol


  • Bus/Format: PCI Express(R) x1 (compatible x1, x4, x8, x16 slots)
  • Size: 111.15 mm x 167.65 mm x 20 mm
  • Power requirements (+3.3V/+12V): 0.4 A / 0.12 A
  • Operating: temp / humidity (non-condensing): 0°C / +50°C • 5% / 90%
  • Storage: temp / humidity (non-condensing): -5°C / +70°C • 0% / 95%

Inputs and Outputs

  • Connectors
    – 2 Gigabit Ethernet RJ45 ports for RAVENNA I/O (dual port or Primary / Back up mode)
    – 1 optical connector for MADI I/O  (Factory option) (multimode, 1300nm)
    – 1 BNC for Word Clock In / Out
  • RAVENNA I/O channels: 2 banks of 64/64 I/O (Mono) channels at 44.1 kHz or 48 kHz (64/64 I/O on each Gigabit Ethernet interface)
  • RAVENNA packet size: From 128 down to 1 (ultra-low latency profile) audio samples per RAVENNA packet
  • AES67 compliance: Full compliance in all respects with AES 67
  • Supported audio payload formats: PCM16 / PCM24 / PCM32 / AM824 (PCM24+AES3 channel status)
  • PC Record/Play channels: 64/64 simultaneous Record/Play (Mono) channels to/from PC
  • MADI (Multichannels Audio Digital Interface) inputs and outputs:
    – Optical I/O connector,  64/64 I/O  (Mono) at  48 kHz sampling frequency and  32/32 I/O (Mono) at  96 kHz
    – (Factory option)
  • Word Clock input or output
    – BNC connector, Input or Output position selectable by software.
    – Input : TTL , impedance selectable by jumper (75 Ohms / HighZ).
    – Output : Max 5 Vpp, 75 Ohms output impedance
  • Clock sources:
    – PTPv2 (IEEE1588-2008) from network or internal clock or Word Clock or MADI input
    – Local clock eligible as GrandMaster PTP
    – Local clock precision : better than 10 ppm
  • Sampling frequencies:
    – From local clock: 44.1 kHz, 48 kHz and 96 kHz (MADI)
    – From network or Word Clock:  44.1 kHz, 48 kHz and 96 kHz (MADI)
    – From MADI: 44.1 kHz, 48 kHz, 96 kHz

Control and routing

  • Control
    – HTTP (web pages from embedded server)
    – EMBER+
  • Routing: Zero latency on-board routing matrix between RAVENNA, PC Rec/Play and optional MADI  channels


  • Latency: Round trip time down to 0.8 ms (excluding IP network)
  • Supported operating systems: Windows 10, 8 and 7 32/64bits, Windows server 2003/2008, Linux
  • Supported drivers: ASIO, WASAPI / low latency WDM DirectSound, ALSA


  • Seamless migration to IP: High density, ultra-low latency and phase accurate AoIP / PC / MADI bridge
  • Secure content delivery: HW-based permanence of service whatever the applications running on the host PC
  • Same latency as Digital audio: Sub-millisecond round trip latency
  • Ensure interoperability: LX-IP is fully compliant with triple standards AES67, RAVENNA and MADI (AES10)