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Milan Specifications

Milan creates the endpoint solution layer for professional audio equipment based on the following AVB IEEE standards:

  • IEEE 802.1BA-2011
  • IEEE 802.1Q-2011
  • IEEE 802.1AS-2011
  • IEEE 1722-2016
  • IEEE 1722.1-2013

Therefore, Milan defines a set of technical profiles for these IEEE standards dedicated to professional audio endpoints:


Formats Interoperability Specification

Milan defines three stream format profiles for professional audio devices based on the IEEE 1722-2016 Standard AAF Audio Format. The advantage of AAF is that it is less complex and more efficient than AM824.


Media Clocking Interoperability Specification

There are a number of methods that can be used for synchronizing media clocks on a local area network (LAN). This document defines the Milan required method for providing interoperable and certified media clock synchronization for Pro Audio devices.


Redundancy Interoperability Specification

Milan redundancy works to give ProA AVB devices the ability to endure against a number of network failures.


Device Discovery & Control Interperability Specification

Milan relies on the IEEE1722.1-2013 Standard for Device Discovery, Connection Management and Control Protocol. This standard is very vast and allows for many interpretations. Therefore, Milan defines a profile for professional audio devices with a small subset of the standard, and removes all ambiguities from this subset in order to achieve interoperability at the Control layer.

This specification will be published when available.

Avnu Specifications

Automotive Ethernet AVB Functional and Interoperability Specification Revision 1.5

This document is Avnu’s interoperability and functional specification for automotive Ethernet AVB devices. The document’s primary goal is to provide a baseline specification of Ethernet AVB functionality on automotive AVB devices. The specification has several uses, three of which are key. First, vendors can use this specification to guide their automotive AVB product development. Second, Avnu can use it to develop an effective certification process. Third, and most importantly, automotive OEMs can depend on the specification to provide a foundation for AVB functionality in their automobiles. OEMs can be assured that a device certified to be compliant with this specification would provide baseline AVB functionality, would not require extensive testing on their part, and would thereby allow them the time to focus on other functionality that helps differentiate their final product and enable success in the automotive marketplace.

802.1AS Recovered Clock Quality Testing Revision 1.0

The Generalized Precision Time Protocol (gPTP) provides an accurate time base to all time aware elements in an Ethernet network. Applications such as Audio/Video and Automotive/Industrial Control rely on the time provided by this protocol for synchronization of events. This specification defines methods to measure gPTP recovered clock quality for Avnu certification.

Avnu ProAV Endstation and Bridge Functional Interop Specification Revision 1.1

This document’s primary goal is to provide a baseline specification of Ethernet AVB/TSN functionality on Professional Audio/Video AVB devices. Vendors can use this specification to guide their Professional Audio/Video AVB product development.

Test Plans

Test Plan for 802.1AS: Timing and Synchronization for Time-Sensitive Applications in Bridged Local Area Networks Version 1.0.1

This document is intended to be representative of the scope and format of a Avnu test plan.  Included is a complete Table of Contents of every test case.  The last test case is unabridged to convey the level of detail represented in Avnu’s test plans.