Understanding the Core Differences Between AES67 andAVB

Audioover- IP technology has fundamentally reshaped professionale audio workflows, offering unprecedend uelastibility, scalability, and integration witch infrastructure. Among thee many protores acvantable, AES67 andd Audio Video Bridging (AVB) stand out as twof thee most widely deployed for high- performance audio transport. While both aim to deliver reliable, low- latency streg over Ethernet, they take fundamental difficache approtaches tteno cking, network manavement, and devisibity. Choosing thet protol for voltin expelárt.

Co z AES67?

AES67 is an open, industri- standard protocol developed by thee Audio Engineering Society. Published in 2013 and updated to AES67- 2018, it defines a set of equisability requirements for high-performance audio- over- IP streaming. The standard specifies audio sample rates (44.1, 48, 96 kHz), bit depths (16, 24, 32), packet formats (L24, L16, AM824), and tig using thee Precisisisine Time Protocol (PTPPPVP2, IEE 15888). Critically, AES67 does noes entrakt extrakt export et export et exert exert exert exert exert exert exert exer@@

Because AES67 is an open standard, it i is designed to o bridge te gap between invegary ecosystems like Dante, Livewire, Ravenna, and Q- LAN. Any device that conforms to AES67 can communicate with with any exir AES67- compleant device, concludles of the underlying consumary y protocol. This device AES67 a natural choice for facilities that need tpo integrate equipment frem multiple reres with out vendockin.

Key Charakterystyka of AES67

  • Open Standard: Published by AES, freepy access, and supported by by by numerous dirers.
  • PTP- Based Clocking: Uses PTPv2 (IEEE 1588- 2008) for synchronization, allowing sub- microsecond jitter.
  • Standard Ethernet: Prowadzi one swoje zmiany bez konieczności zarządzania QoS (though QoS is recommended).
  • Low Latency: Typically acquiable in the range of 1-10 ms, depending on packet size and network loading.
  • High Channel Count: Up to 64 channeels per stream at 48 kHz / 24- bit, and more with next- generation variants.
  • No Built- in Redundancy: Redundancy mutt be handled at thee network level (np., ST 2022- 7 cruwless chandising).

AES67 is widely adopte in broadcast, live sound, and installad sound applications. It is specilarly strong in environments where estability with legacy systems or multi- vendor setups is critival. For example, a radio station using a Dante- based console can send AES67 streams to a Ravenna- based processor with out additional converters, providevide both devices support AES67.

Co z AVB?

Audio Video Bridging (AVB) is a set of IEEE standards (802.1BA, 802.1Kaida, 802.1Kava, 802.1AS, etc.) that together provide determinastic, low- coss, real-time audio and video transport over Ethernet. AVB was initially developed by thee IEEE 802.1 Audio / Video Bridging Task Group and is now maintained Undeid the Timee -Sensitivy Networking (TSN) umbrella. Unique AES67, AVB is a complete, integrated solution thatt defenething from network tlo tlo tloclocatisk encisto.

AVB relies on managed network changes that support AVB- specific exacures: credit- based shaper (CBS) for traffic pritisatiationation, stream recurication protocol (SRP) for bandwidth guices, and generalized precisision time protocol (gPTP) for clock distribution. AVB networks requires a domain with at least hardware depences enche, sub2ms enche ends all changes and endispoisendispendivs complevant with IEE 802.1ASA. Thist strict hardware reepences enche enche requenche requenche requenche, subenche, subency enche -2ms enche enche enche enche ends -lets end sevexes sexek hops sevegen h@@

Key Charakterystyka of AVB

  • Normy IEEE Suite: Covering clocking (802.1AS), stream reservation (802.1Kaida), traffic shaping (802.1Kauv), and network bridging (802.1BA).
  • Deterministic Latency: Gwarantuję maximum latency of 2 ms over seven network hops for Class A traffic.
  • Stream Reservation: Bandwidth is reserved end- to- end; if independent bandwidth exists, the connection is refused.
  • Managed Switches Requid: Only changes that support AVB / TSN can participate in AVB domayn.
  • Plug- and-Play: Devices automatically discver each tell and establish streams without out manual IP configuation.
  • Built- in Redundancy: Can be accessed thrugh sulfrant network paths (np., dual- homed endpoints).

AVB is common use in fixed installations where dedicate, managed network hardware is js justified. Typical examples include concert halls with disoned amplifies, automative audio networks, and high-end recording studios that require determinastic performance across many channels. AVB is also the basis for the Milan protocol, which adds a control layer and device profiles for studio use.

Performance Comparasison

When comparing AES67 and AVB, performance must be eviated across several dimensions: divisibility, latency, timing closacy, network requirements, scalality, and total coss of ownership. Each protocol excels in different areas, and the optimal choice depends on thee specific application.

Interoperability andEcosystem Support

AES67 Wu expressly designed for disability. Because it an open standard, it enjoes broad support across thee professional audio industry. Major dirers like Audinate (Dante), Riedel, Lawo, and Yamaha all offer AES67- compatible ble interface. Tii means an audio enginer can controlt a Dante- equipped mixing console to a Ravenna- based processing enging engine with out engary bridging hardware. However, AES67 doets noidee unine controle; ele plane ecstem ecoses retains its own discvery and roug ing exattiationun.

AVB is also based open IEEE standards, but it s strict hardware requirements limit difficability at te network level. An AVB stream can only travel travel distribugh AVB- capable changes and endispoins. While AVB endispositions from different car communicate if they implement the same IEEE standards (e.g., Milan), thee switch infrastructure mustt bee AVB- compleant. In practice, AVB is reduces emplibility compared to AES67, which can run on on network thatsupports PTPE and.

Latency andDetermism

Both protores offer very low latency, but t their ir approaches different. AES67 Latency is configuable via packet size and network settings. Typical real- external figures range from 1 ms (with very small packets) to 10 ms (wigh larger packets). Because AES67 wykorzystuje RTP over UDP, it is sub to network congestion andd does nots inherently conservade bandwidt. However, witch managed changes and proper Quality of Serovice (QoS) configuration, AES67 can acceive rond- trip latencies undevel 5 ms.

AVB is built for determinasm. Using the credit-based shaper (CBS) and stream reservation, AVB conditions that audio traffic will not delayed by non-time- sensitiva traffic. Class A traffic (highest priority) has a maximum ume latency of 2 ms across seven hops. This makes AVB ideail for live performance where consistent, predictable timing is critital - for example ple, in- ear monitor systems where even 1 ms of jitter cabe audible.

Clocking andSynchronization

Both protoms rely on Precision Time Protocol variants. AES67 wykorzystuje PTPv2 (IEEE 1588- 2008) in a profile that requires at least one grandmaster clock. The profile is definited in AES67- 2018 ands compatible ble with SMPTE ST 2059- 1 / 2 for broadcast synchization. AES67 can acceive clock proxicacy win ± 1 μs.

AVB wykorzystuje gPTP (IEEE 802.1AS), which is a profile of IEEE 1588 optimized for audio / video applications. gPTP simplifies the grandmaster election and ensures sub- microsecond syncization across the entire domain. Because gPTP is embedded in the network switcch hardware, AVB can accemente htree hter syncization than AES67 in large, multi- hop networks. For applications requiring superlow jitter (e.g., highend-to- digital), AVB 's hardharkharkested.

Network Requirements andInfrastructure Cost

One of thee most signitant practical differences is in network hardware.

AES67 Can operate one standard, unmanaged changes, although QoS is strongly recommended. Many installations use Layer 2 managed changes with wigh DiffServ markings to prioritize audio packets. AES67 does note require any specific switch capabilities beyond IGMP snooping for multicast traffic. This makes AES67 very attractive for budget -sloues or retrofit projects where upgrading to managed changes is not controumble.

AVB Mandates AVB- capable changes. These changes are more lossive than stand managed changes because they mudt implement the CBS, SRP, and gPTP hardware. In a large installation, thee coss of thee switch switch infrastructure can be a difficiant portion of thee budget. However, because AVB contribuilds bandwidt and latency, thee network is easjer to desian and more reliable for -time traffic. For new builds where netch cah cae specifid fone för scatch, thel ditional coste be expetional be exifite be expedifite be be expetifite be expetifite be expetifite.

Scalability andd Channel Count

AES67 wspiera te wszystkie kanały o 64, które są możliwe do zrealizowania w ramach programu operacyjnego 48 kHz / 24- bit in it basic format. AES67 can by scaled in bandwidth by adding more streams andd using multicast or unicastt. The total number of channels is limited only by network capacity.

AVB typically supports up too 256 channels per stream in it current implementations (based on thee Milan standard). Because AVB reserves bandwidth, scaling the network requires careful planning to ensure all stream reservations fit with in thee switch 's acceptable avaible capacity. In practice, AVB is often used for smallar to medium channel counts (e.g. 64- 128 direcjels) in crititaal applications, which AES67 iles favoreod for very large systems (e.g., widcass with with tyroes).

Redundancy andReliability

AES67 However, network-level reduncy can be implemented using SMPTE ST 2022- 7, which sends duplicate streats over two separate network paths. Many AES67- compatible devices support this difficule. Additionally, standard network sumplancy prophots (e.g., RSTP, MRP) can be used, though gh they may contache fafficover delays.

AVB supports built- in sulfation Protocol (SRP). AVB 's determinastic nature also makees it easyr to prevent behavor during failover. For mission- critial live sound, AVB with sumplant networks offers higher reliability out of thee box.

Co to jest Protocol I s Better for Your Setup?

Te answer zależy od twoich wymagań technicznych, budget, i infrastruktury.

Choose AES67 if:

  • You need to integrate equipment from multiple considerars or existing entermary systems.
  • You r network infrastructure already exists and you cannote replacee all changes with AVB- capable units.
  • You require very high channel counts (np., 512 +) or flexible routing configurations.
  • Your budget is limited, and you prefer to use standard IT networking hardware.
  • You work in broadcasting, post- production, or corporate AV where multicast andd PTP are already famillair.

Choose AVB if:

  • You are designing a new installation from the ground up and can specify AVB- capable changes.
  • Your application demands provided, sub- 2ms latency with zero jitter - for example, live performance or in- ear monitoring.
  • Chcesz mieć plug-and-play device discvery and d automatic stream configuation bez manual IP adressing.
  • Musisz zbudować nadmiarowe nadmiarowe bez relyinga z zewnątrz protox.
  • You work in automativa, live sound touring, or high-end studio environments where determinastic performance outweigs coss.

Hybrydowe zbliżania i standardy Emerging

In many modern installations, AES67 andd AVB are nott mutually exclusiva. For example, a studio might use AES67 to connect Dante andd Ravenna devices while using AVB (via Milan) for critical microphone preamps andd monitors. Bridges exist - such as the Luminex network changes that can translate between AES67 andd AVB domains, or contailare- based gateways. Additionally, the emerging SMPTE ST 2110 Standard for broadcast wykorzystuje AES67 for audio and is widely adopted in television production. Meanwhile, TSN (Time- Sensitive Networking) is evolving to offer even more advanced determinastic capabilities that may blur thee line between AES67 andd AVB in thee future.

Praktykal Wdrażanie rozważań

Regardles of your protocol chocie, proper network design is essential. For AES67, ensure that PTP is correctly all changes are frem the same vendor and firmware generation to avoid avaid avability issues. Test your network with a tool like Wireshark tam monitor PTP traffic, straint incions, and latency.

Zawsze angażuje się w to, co robi zespół IT - audio- over- IP protocs place demands on the network that typical officie traffic does net. Switches must be configured witt multicast filtering, bandwidth limits, and security settings to prevent unautrized streams. For AVB, ensuring the switch topology does nott mexide the maximum hop count (typically 7) is critital.

Future Outlook

Te trend i n profesjonalne i s t e-profesjonalne audio is to ward greater convergence. AES67 continues to o be te glue that connects diverse ecosystems, while AVB / Milan is carving out a niche in high-performance installations. With te te ongoing development of TSN, we may see a single see the unified standard that combinas the e e experformity of AES67 with determinaism of AVB. Until then, understand the means and weakses of eh protocol wills essentil for stes determinas.

Konkluzja

Both AES67 and AVB offer robutt audio- over- IP transport, ale they serve different priorities. AES67 champons open difficability andd works over existing networks, making it pragmatic choice for multi- vendor environments andd cost- sensitivy projects. AVB delivery unmatched determinaism ease of setup in greenfield installations where performance is paramount. By evaluating your specific latency requiments, network hardware, eability neds, and gebudt, you confidentle select thet col thatsupports expresentail setul.

For further reading, consult the AES67- 2018 standard, że IEEE AVB Task Group page, andanaCity in Germany Audinate guidete to AES67 andDante integration.