AoIP interconnections provide more flexible and elegant replacements and offer greater capacity, flexibility and multicast possibilities than traditional audio tie-lines, and on an infrastructure which can be shared with other services.

Calrec’s range of IP products means broadcasters can be confident in switching to an IP infrastructure with minimal disruption to their audio workflows. Calrec’s suite of IP products reinforce Calrec’s progress towards the future of audio transport.

Read how Calrec is helping broadcasters transition to IP Workflows

The Product Book
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The Product Book



Broadcasters are demanding more versatility and integration from their audio equipment. For audio systems to be able to meet those demands, broadcasters must give greater consideration to the networking of audio consoles, routers and I/O, and to the efficiencies of controlling them.

AoIP interconnections provide more flexible and elegant replacements and offer greater capacity, flexibility and multicast possibilities – and on an infrastructure shared with other services.

Working with multi-vendor organisations like AIMS and AMWA, Calrec’s integral suite of management tools provide additional benefits to allow remote configuration patching, port protection, alias files, virtual patchbays, and access rights, and reinforces Calrec’s commitment to the future of audio transport protocols. Having a suite of solutions to choose from means broadcasters can be confident that they’ll have Calrec’s support no matter which combination of formats they use — both now and in the future.

Find six reasons to go IP here.




  • Calrec’s H2-IP Gateway provides an interface between a Hydra2 network and an AoIP network. It awards an extra control level that allows audio labels to be passed in both directions between the two networks along with control data.

    This gives Hydra2 users the ability to control gain of Calrec AoIP mic inputs, and AoIP users can control gain of Hydra2 mic inputs. The H2-IP Gateway is SMPTE 2110/AES67-compatible and expands Calrec’s range of AoIP solutions.

    The 1U gateway can pass either 256 or 512 channels of audio in each direction and multiple gateways can be used to increase capacity or to connect with multiple networks. For full hardware redundancy additional units can be deployed as backups.

  • The Calrec Audio over IP unit provides a Hydra2 AoIP interface carrying up to 512 x 512 channels using AES67/Ravenna.

    The unit can accommodate two modules and may be fitted with one or two 256 x 256 channel AES67/Ravenna modules, or one of each type as required. In addition to the standard Hydra2 redundancy each module also has both a primary and secondary 1GB IP connection, supporting hitless switching for redundancy.

    • Hydra2 AoIP interface carrying up to 512 channels using AES67/Ravenna across dual modules
    • Primary and secondary 1GB IP connections
    • Primary and secondary Hydra2 connections
    • Supports hitless switching
  • AoIP Modular I/O Controller Card

    Calrec’s AoIP Modular I/O Controller card fits into a standard modular I/O rack and can operate in either Hydra2 or AoIP mode. The mode is selected via a simple switch on the card making it dual purpose, allowing for it to be used on either network. Not only does this make a tailorable AoIP I/O solution for the ImPulse core, it also fits into existing Modular I/O frames so units can be upgraded in the field.

    The card provides two redundant pairs of 1G SFPs to allow 512 audio channels to pass without over-using bandwidth in AoIP mode.

    The AoIP Modular I/O Controller card is SMPTE 2110/AES67-compatible and expands Calrec’s range of AoIP solutions for new and for existing customers.

    Dante/AES67 card with network redundancy

    Calrec’s Dante/AES67 card provides an interface for routing audio in and out of a Hydra2 network into a Dante network. The interface is via RJ45 connectors housed within a 1-slot wide module.

    Dante is a self-configuring, plug and play, digital audio networking technology developed by Audinate. Dante uses standard internet protocols. The Calrec Dante modular I/O card operates over Gigabit (Giga/E) Ethernet.

    The card provides 64 input channels and 64 output channels (for a Dante network operating at 48 kHz or 44.1 kHz), or 32 input channels and 32 output channels (for a Dante network operating at 96 kHz) sample-rate converted down to 48kHz with the SRC’s permanently enabled on all channels.

    Two RJ45 ports (primary and secondary) are provided to give full redundancy on the Dante portion of the network.

    Waves Soundgrid I/O card

    Calrec’s Soundgrid card provides 64 outputs from the Hydra 2 network to the SoundGrid network, and 64 inputs to Hydra 2 from SoundGrid at 48 kHz via a single Ethernet cable.

    SoundGrid is an Audio-over-Ethernet networking and processing technology developed by Waves. SoundGrid provides extremely low-latency, high-channel-count audio processing using standard Intel CPUs and 1 Gbps Ethernet networks for studio, live sound, and other real-time professional audio applications.

    Real-time audio processing is performed on standard Intel-based plug-in servers, running a Waves-customised real-time version of Linux.