
New WMAS Standard Promises More-Flexible, Protected Wireless Operations Shure, Sennheiser establish early beachheads in what could be a game-changer By Dan Daley, Audio Editor
Wednesday, November 6, 2024 - 7:00 am
Print This Story | Subscribe
Story Highlights
The lengthy narrative around the arrival of Wireless Multichannel Audio Systems is seemingly at its end. In October, the Federal Communications Commission (FCC) conferred its bureaucratic blessing on the RF technology that allows significantly denser multiplexing of audio channels onto a single wideband RF carrier. Referred to by the only slightly less unwieldy acronym WMAS, the new standard promises an easier and more flexible wireless workflow and greater protection for other services sharing the same frequency band. It is widely considered a game-changer for managing wireless signals in a narrower, denser spectral environment in the wake of multiple spectrum reductions over the past two decades.
The approval has also opened a new front in the wireless-microphone competition, one in which two of the sector's largest brands, Sennheiser and Shure, have quickly staked substantial claims.
Sennheiser's Joe Ciaudelli: With WMAS, you're using the same RF channel and the same amount of bandwidth for [multiple mics] as for one.
It is definitely the start of a new era of wireless-microphone technology, says Joe Ciaudelli, director, spectrum and innovation, Sennheiser. Noting the nearly six years the FCC spent considering the technology and the eight months, from February to October, it took to publish its finding in the Federal Register, he adds, We expect the competition to be rigorous.
Shure Senior Director, Product Management, Nick Wood puts the arrival of WMAS into broad context: Any change in the UHF TV bands is a really big deal given the changes that have happened over the past 20 years, most of which affected access to spectrum. This one is a great development because it changes what we can do with it, and Shure has been determined to push the envelope with spectrum efficiency. What can be done with the spectrum that we have and the WMAS regulations unlock a new innovation space for us. We want to use that to let the people who produce these events, including broadcast sports, to be able to do more with the spectrum they have that day and be able to say yes to one more wireless microphone.
Two Competitive Fronts Sennheiser's flagship WMAS offering is the Spectera line, introduced at IBC in September (the technology is already an ETSI standard in Europe) and demonstrated at the Americas Spectrum Management Conference in Washington, DC, last month. It features wideband, bidirectional bodypacks and a central unit that can handle up to 32 I/O. Its bidirectional wireless ecosystem supports data and audio control in a single RF carrier for all components and for such parameters as IEM volume, audio level and settings, RF health, and battery status. Sennheiser asserts that it is able to accommodate an entire production in a single wideband (6- or 8-MHz) RF carrier.
Shure's entry takes the form of a new iteration of the company's Axient wireless series: Axient Digital PSM combines its first digital wireless in-ear monitoring solution with its first WMAS-enabled product. It was announced Oct. 22 (although it had been selectively previewed privately two weeks earlier during the AES/NAB expo in New York, at which Sennheiser did not exhibit). Stereo capability enables Axient Digital PSM to operate as two discrete channels, allowing a stereo audio channel to function effectively as two mono IFB channels. Additionally, the capability to send Dante signals to the Audio Digital Transmission Exchange (ADTX) simplifies routing. The WMAS wideband implementation supports up to 28 channels per 6 MHz in the U.S. and 40 channels per 8 MHz in Europe; a narrowband mode provides access to more RF output power per channel while maintaining spectral efficiency at 17 channels per 6 MHz.
Changing the Game The new FCC rules will allow WMAS to operate in the broadcast-TV bands and in the 600 MHz duplex gap on both a licensed and an unlicensed basis and in other Part 74 LPAS (low-power auxiliary stations) frequency bands on a licensed basis. Power restrictions are 50 mW in the VHF-TV bands, 250 mW conducted power in the UHF band, 20 mW in the 600 MHz duplex gap (653-657 MHz), 250 mW conducted power in the 1435-1525 MHz band, and 1 W conducted power in all other bands, according to the FCC's website. WMAS will enable more wireless microphones to operate in the available spectrum (more microphones per megahertz of spectrum), providing additional options when more microphones are needed.
The WMAS rules do not alter existing spectrum rights or expectations regarding spectrum access and availability related to other authorized users' sharing the frequency bands with wireless-microphone operations (including, for example, broadcast licensees, Wi-Fi, and white-space-device users).
Sennheiser's Take For broadcast-sports applications, Ciaudelli - who contends that Spectera is the most innovative product the nearly 80-year-old company has ever produced - notes a broadcaster's typical complement of one transmitter for a microphone and one receiver for an IFB. That, he says, can be condensed into a single transceiver using Spectra WMAS. There's a similar benefit for large-scale events, such as the Olympics, in which various echelons of wireless mics are in either active or on standby status as a production unfolds.
With WMAS, he explains, you could give the vast majority of the spectral resources to the mics that are currently on-air. The mics that are, let's say, on deck' you give just enough resources to make sure that they remain linked to the base station in a ready mode. You're using the
North America Stories
14/04/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
14/04/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
14/04/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
14/04/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
14/04/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
14/04/2026
Wowza will return to NAB Show 2026 with a set of live demonstrations focused on how video infrastructure is evolving for a new generation of AI-powered and oper...
14/04/2026
Stegawave Debuts Real-Time Forensic Watermarking to Tackle Piracy in Live Sports...
14/04/2026
Living in Boston: A Guide for Incoming Boston Conservatory Students From navigating the T to balancing school with professional gigs, a current student shar...
14/04/2026
Just What Is Genre These Days, Anyway? Understanding the business and art of genre-bending in 2026.
April 10, 2026
By
Bryan Parys
Illustration by Jack Fla...
14/04/2026
Lenora Helm Hammonds Is Turning Passion Into Plan A The dean of the Professional Education Division has seen the industry from all sides. Now shes bringing it...
14/04/2026
How Michelle Zalabak Found Her Dream Career in Music and Finance The Warner Music Group deal analysis manager helps determine what artist catalogs are worth a...
13/04/2026
Telos Alliance has announced that J nger Audio has joined the EBU ADM Implementers Group (ADM-IG) as a founding member. The group is focused on advancing ADM an...
13/04/2026
Grass Valley will demonstrate its Alliance Partner ecosystem at NAB Show 2026 (Booth C2408, Central Hall, April 19-22), showing AMPP integrations across live pr...
13/04/2026
Media Links will exhibit at NAB Show 2026 (Booth W2033), demonstrating IP transport solutions for live production including hitless protection technology, Xscen...
13/04/2026
NBC Sports has announced a programming, distribution, and sales partnership with...
13/04/2026
FloSports has promoted Chief Operating Officer Jayar Donlan to President, effective immediately. In his new role, Donlan will lead the company's commercial,...
13/04/2026
PanCam Pictures, the documentary production company founded by Paul Camarata, us...
13/04/2026
Mimir will exhibit at NAB Show 2026 (North Hall, Booth N2850), demonstrating its cloud-native media production platform with new capabilities including Mimir Cu...
13/04/2026
BBright has announced that its IP Gateway now supports the Reliable Internet Stream Transport (RIST) protocol. The addition will be introduced at NAB Show 2026 ...
13/04/2026
Net Insight has been awarded a development project through the European Space Agency's Navigation Innovation and Support Program (NAVISP), with co-funding f...
13/04/2026
intoPIX will exhibit at NAB Show 2026, marking the company's 20th anniversary. The company will demonstrate its JPEG XS compression portfolio and IPMX-appro...
13/04/2026
Starting from scratch, the team built an in-house content platform comprising ga...
13/04/2026
Here's a look at some of the new products and updates, along with audio-centric conferences, that attendees will find next week at the show
When the 2026 N...
13/04/2026
Avid will launch new integrated newsroom capabilities for Avid for News at NAB Show 2026 (Booth N2226, April 18-22), demonstrating how Avid Content Core connect...
13/04/2026
Synamedia has announced a new version of Quortex PowerVu, an IP-native, software...
13/04/2026
Mediaproxy has developed a suite of AI-powered tools for brand and advertisement tracking, integrated into its LogServer compliance logging and analysis platfor...
13/04/2026
Disguise will demonstrate its media servers and software at NAB Show 2026, appearing across five partner booths in Central Hall: MRMC, B&H, Planar, CarbonBlack,...
13/04/2026
OpenDrives is introducing OpenDrives Edge at NAB Show 2026, a hybrid cloud-edge performance accelerator for distributed video and rich media workflows. The prod...
13/04/2026
The show will deploy 18 cameras across two sets and the draft floor, including a...
13/04/2026
L3Harris is accelerating the development of infrared payloads for Space Development Agency's Tranche 2 Tracking Layer, to help meet urgent national defense ...
13/04/2026
By leveraging cutting-edge unfilmed Gen III image intensifier technology, NOVA delivers unmatched clarity, range, and reliability in low-light environments - en...
13/04/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
13/04/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
13/04/2026
Explore new Disguise plugins, including Sony's VP integration; Listen to panels across partner booths at Sony and B&H
Disguise, the company powering everyt...
13/04/2026
TAG Video Systems, the leading IP-native Realtime Media Platform, has announced its participation in the Media Exchange Layer (MXL) interop initiative. TAG has ...
13/04/2026
Today, Chaos launched V-Ray for Blender Community Edition at BCON Austin 2026, making its production-proven 3D renderer free for all Blender users. The same Aca...
13/04/2026
Additions strengthen LTN's leadership as broadcasters scale satellite-to-IP transition
LTN today announced the appointments of Mark Romano as Vice Presiden...
13/04/2026
LEEDS, UK, APRIL 13, 2026 NUGEN Audio releases Halo Vision v1.2, a significant update to its real time, customizable audio analysis suite for 3D, surround and...
13/04/2026
Atomos today announced the acquisition of Flanders Scientific (FSI), one of the most respected names in professional reference monitoring. This strategic move r...
13/04/2026
How Mei Semones Built Her Sound from J-Pop, Jazz, and Bilingual Songwriting The indie-pop artist combines agile guitar lines, rhythmic shifts, and lyrics that...
13/04/2026
Cue the Change: Jonathon Heyward Is Making Classical Music More Relatable Nicknamed the Converse Conductor, the Boston Conservatory alum holds top conductin...
13/04/2026
Heat Wave: Inside Miamis Sizzling, Boundary-Blurring Latin Music Scene In a city shaped by migration and exchange, Berklee alumni are helping drive a Latin mu...
13/04/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
13/04/2026
DHD audio, developer and manufacturer of digital audio systems for professional broadcast, has launched a comprehensive brand update to mark its 30th anniversar...
13/04/2026
Stegawave, an Irish technology company specialising in forensic watermarking for video content, today announced the launch of its anti-piracy platform for live ...
13/04/2026
New version of Quortex PowerVu delivers a standards-based approach to satellite-to-IP transitions, eliminating the need for baseband workflows and complex infra...
13/04/2026
Grass Valley LDX camera systems enable leading German production company to support broadcast and cinematic live production within a single environment.
Grass ...
13/04/2026
London, UK, 13 April 2026 Techex and MediaKind today announced a partnership to integrate Techexs IP transport and orchestration technology, tx edge, directly...
13/04/2026
In today's hybrid education environments, there is no one-size-fits-all' AV solution. Lightware's extensive AV portfolio addresses this challenge, ...
13/04/2026
Mediaproxy, the global standard for software-based IP compliance monitoring and multiviewing solutions, has developed a new suite of AI-powered tools designed t...