Understanding the Protocols

Selecting the right audio and control protocol is critical for system performance, scalability, and long-term reliability. Dante, Ravenna, and Livewire+ each serve distinct roles in professional AV environments, but their architectures, design philosophies, and underlying technologies differ significantly. This deep dive examines each protocol in detail, comparing their strengths and limitations across real-world deployment scenarios.

Dante: The Ubiquitous Audio Networking Standard

Developed and maintained by Audinate, Dante has become the de facto standard for professional audio over IP, with over 3,000 certified products from more than 500 manufacturers. The protocol operates on standard layer 3 IP networks, meaning it can coexist with data traffic and be managed using familiar IT infrastructure. Dante uses a patented clocking mechanism based on IEEE 1588 Precision Time Protocol (PTP) to achieve sub-millisecond latency, typically less than 250 microseconds in well-configured networks.

Key technical attributes include:

  • Channel density – A single gigabit Ethernet link can transport up to 512 audio channels at 48 kHz, and multi-switch topologies scale to thousands of channels.
  • Auto-discovery – The Dante Controller software automatically discovers all devices on the network and enables drag-and-drop routing.
  • Redundancy – Support for both secondary network ports (using separate cabling) and seamless failover configurations.
  • Latency – Configurable from 0.25 ms to 5 ms, with low latency modes ideal for live sound monitoring and recording.

Dante’s wide adoption means that engineers can easily integrate products from different brands without worrying about interoperability. The protocol also supports Dante Virtual Soundcard for computer-based audio playback and recording, and Dante Domain Manager for network-wide user management and security. Audinate’s official website provides extensive documentation and training resources.

Ravenna: Open Standard for Broadcast and Media Networks

Ravenna, originally developed by ALC NetworX, is an open, IEEE-standard-based suite of protocols designed for real-time audio and video transport over IP. Unlike Dante’s proprietary control layer, Ravenna uses IETF and IEEE standards such as RTP, RTCP, and PTPv2 (IEEE 1588-2008), making it inherently multi-vendor interoperable at the protocol level. It is particularly prevalent in broadcast environments where open architectures are mandated.

Core capabilities include:

  • Multi-stream support – Simultaneous transport of audio, video, and metadata over the same network infrastructure.
  • Precision synchronization – Uses PTPv2 with sub-microsecond accuracy, critical for video frame-locked audio and multi-room systems.
  • Media clock recovery – Built-in mechanisms to maintain sample-accurate timing even across large network hops.
  • Scalable redundancy – Support for ST 2022-7 seamless redundancy, Media Redundancy Protocol (MRP), and other resilience schemes.

Ravenna’s strength lies in its flexibility: because it uses standard transport protocols, audio can be routed using existing network switches without vendor-specific licenses. Many broadcast consoles, codecs, and AoIP interfaces from manufacturers like Lawo, AEQ, and DirectOut rely on Ravenna. For complex installations involving video-over-IP, the Ravenna website offers whitepapers on integration with SMPTE ST 2110.

Livewire+: Control-Focused Protocol for Crestron Ecosystems

Livewire+ was created by Crestron specifically for communication between Crestron control processors, touchpanels, and third-party devices. It is not a general-purpose audio transport protocol but rather a robust serial- and Ethernet-based control language. Livewire+ operates bidirectionally, enabling high-speed feedback and real-time status monitoring across a building automation network.

Distinctive features include:

  • High-speed signaling – Can transmit control commands and status updates with low latency, suitable for time-critical AV switching and lighting control.
  • Native integration – Works out-of-the-box with all modern Crestron processors (like the 4-Series), simplifying programming via SIMPL or SIMPL#.
  • Security – Supports encrypted communication and user authentication, essential for enterprise and government installations.
  • Hybrid cable support – Operates over standard CAT5e/6, Crestron DM (DigitalMedia) networks, and even wireless via Crestron Connected.

Livewire+ is ideal for controlling audio DSPs, video switchers, lighting dimmers, shades, and climate systems. Its biggest limitation is that it is tied to the Crestron ecosystem—devices from other manufacturers require a Crestron driver or gateway to translate commands. For environments already invested in Crestron hardware, Crestron’s training portal provides detailed programming guides.

Head-to-Head Comparison

To choose wisely, it helps to compare the three protocols across the metrics that matter most in professional systems: latency, scalability, synchronization, redundancy, and vendor lock-in.

Latency and Audio Transport

Dante and Ravenna both offer sub-millisecond audio transport, with Dante often achieving round-trip delays of 250 µs in optimal configurations. Ravenna can match this but typically runs at 1 ms to ensure compatibility with video signals and wide-area networks. Livewire+, being a control protocol, does not transport audio—its latency metric is about command response time, which is typically under 50 ms over Ethernet.

Channel Capacity and Bandwidth

Dante supports up to 512 channels on a single 1 Gb link, and up to 1024 channels on 10 Gb networks. Ravenna’s channel count is similar but can handle higher sample rates (up to 192 kHz) due to its use of uncompressed RTP streams. Livewire+ does not transport media; its throughput is measured in packets per second, sufficient for dozens of simultaneous control events.

Synchronization Accuracy

Both Dante and Ravenna use PTP-based clocking. Dante’s proprietary leader-follower mechanism ensures sample-locked operation across hundreds of devices without the need for centralized grandmasters. Ravenna relies on standard PTPv2, which allows integration with video clocks and grandmasters from companies like Meinberg or Seiko. Livewire+ synchronization depends on the control bus, typically millisecond precision is adequate for control commands but not for media alignment.

Redundancy and Resilience

Dante offers primary/secondary port failover with separate cable paths; if one network fails, audio continues on the backup within milliseconds. Ravenna supports ST 2022-7 hitless redundancy, which duplicates packets over two paths and recovers without interruption. Livewire+ can be configured with redundant control processors and dual Ethernet connections, but the control logic must handle failover at the application layer.

Ecosystem and Vendor Support

Dante leads in breadth of adoption, from amplifiers and microphones to mixing consoles and speakers. Ravenna is dominant in broadcast, with deep integration in ST 2110 workflows. Livewire+ is proprietary to Crestron but tightly integrated with their entire line of AV and building management products. For multi-brand systems, Dante or Ravenna are preferable; for single-vendor Crestron buildings, Livewire+ reduces complexity.

A helpful reference is the Audio Networking Resource, which maintains compatibility lists for Dante and Ravenna.

Choosing the Right Protocol for Your Application

Live Sound and Recording

For concerts, houses of worship, and music production, Dante is the clear leader. Its low latency enables in-ear monitoring with minimal delay, and the plug-and-play nature allows quick setup when rigging systems. Many digital consoles (Yamaha, Allen & Heath, DiGiCo) have Dante as standard. Ravenna is less common in portable live sound but is used in high-end touring systems requiring redundancy. Livewire+ is not used for audio transport in this space.

Broadcast and Large Venues

Television studios, sports arenas, and convention centers often require multi-format transport (audio, video, intercom, and data). Ravenna’s native support for ST 2110 and AES67 makes it the go-to for broadcasters. Dante can also be used via AES67 bridging, but Ravenna offers a more direct implementation. For control of lighting and HVAC across the same facility, Livewire+ is often deployed alongside Ravenna—each protocol handles its domain.

Control and Automation

Boardrooms, universities, and smart buildings with Crestron central control benefit from Livewire+. It allows touchpanels to command audio DSPs, display switchers, and sensors over a single network. In such environments, Dante might transport audio between zones, while Livewire+ handles the orchestration. Mixing protocols is common; the key is ensuring proper gateways (e.g., Crestron’s Dante module for DSP control) exist.

Installed Systems with Mixed Needs

When a project requires both high-channel-count audio and extensive control, a hybrid architecture is typical. For example, a performing arts center might use Dante for stage audio, Ravenna for broadcast feeds to the lobby, and Livewire+ for the lighting control interface. Network segregation via VLANs ensures each protocol operates without interference. Planning requires understanding the IP requirements: Dante uses multicast with specific QoS settings, while Ravenna uses RTP and may need PTP boundary clocks.

Practical Considerations for Deployment

Deploying any AoIP or control protocol demands solid network engineering. Dante networks benefit from managed switches with IGMP snooping and QoS; unmanaged switches can cause packet loss. Ravenna often requires PTP-aware switches (boundary clocks) for clock distribution across large networks. Livewire+ works over standard Ethernet but benefits from dedicated control VLANs to avoid congestion from video streams.

Training is another factor. Dante certifications (Dante Level 1-3) are widely recognized and free. Ravenna’s open nature means that network engineers familiar with ST 2110 will find it familiar. Crestron offers paid training for Livewire+ programming. Budget for licensing: Dante chipsets have per-device royalties, while Ravenna’s software stack is typically included in the product price.

Future-proofing matters. Dante now supports 96 kHz and 192 kHz sample rates, while Ravenna is evolving with SMPTE ST 2110-30 and 2110-31. Livewire+ is unlikely to change dramatically, but Crestron may extend it to support newer control protocols like MQTT for IoT integration.

Conclusion

Dante remains the best all-around choice for professional audio networking due to its ease of use, broad support, and low latency. Ravenna excels when openness and video integration are paramount, particularly in broadcast facilities that require adherence to open standards. Livewire+ is indispensable for Crestron-centric control systems, providing deterministic communication without burdening the media network. By evaluating your project’s requirements for audio transport, control complexity, vendor independence, and scalability, you can select the protocol—or combination of protocols—that ensures reliable, future-ready performance.