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StageConnect: Behringer protocol is open source

https://github.com/OpenMixerProject/StageConnect
108•jdboyd•5h ago

Comments

jdboyd•5h ago
StageConnect is a connection to transmit 32 uncompressed audio-channels via a single XLR cable. StageConnect is based on A2B, the Automotive Audio Bus (A2B).
lanthade•4h ago
As someone who has been using behringer X/m32 products for nearly 2 decades now (hard to believe it's been that long!) and as someone who's done a lot of high and low end live audio work this is pretty cool. You don't often see mfgrs being so open about transport protocols or the specs are locked behind expensive paywalls and hardware to mess with them isn't remotely affordable.

I am curious how the pictured A2B board interfaces with the X/M32 board. If that's an AES50 implementation then maybe there's the possibility someone could roll up an AES50 router. That could be cool.

mystifyingpoi•3h ago
Lack of open standards also had a very negative effect on prices. A&H stageboxes are super expensive compared to others, but if you run Allen console then there is no alternative. Other than Dante I guess, but that is also expensive.
geenat•3h ago
Behringer has been fairly consumer friendly over the years, it's much appreciated- its something I consider when buying audio stuff.
bigyabai•3h ago
They've got their fair share of missteps too. Love my Behringer Neutron though, never regretted buying it at-launch despite all it's quirks. The noise on the bucket bridge delay has gotten me called some pretty nasty names on forums over the years.
NoiseBert69•2h ago
Behringer evolved from a "cheap unusable shit" to very solid gear and a company that listens to their users.

If you want to enter the market you must beat their stuff price/quality wise. That's not easy in 2025.

The entire audio/venue biz is heavily driven by mouth-to-mouth propaganda and personal networks. A friend of mine knows Uli Behringer personally - if one of his mixing console hangs itself during a concert you know who's getting a very angry call at 1:00 o'clock. If people stop losing trust in your stuff nobody will buy the rotten product (or worse entire product series) anymore.

It's the same for the video production scene. It will make you very rich if your product is very good - if it blocks a production or even worse destroys a recording you'll be beaten out of the market with fists. And the people will track your records down if you change your legal name if you are trying to back in.

The scene loves and hates with a lot of passion. And they have a memory like elephants and never forgive.

CaptainOfCoit•1h ago
> If you want to enter the market you must beat their stuff price/quality wise

Yeah, if the market you're talking about is "price/quality", but most musical gear doesn't sit in that market, but a wildly different one, and in that one you don't have to beat Behringer to be successful, and granted your stuff is high quality and actually innovative enough, you can almost set the price freely.

derriz•3h ago
Why would you choose XLR as a connector for an application like this? Why choose one of the most common connectors you’re likely to see in an environment where someone will be mixing audio for a completely incompatible application? Hope the devices can handle accidental 48V phantom power without damage.

The audio world has history here. A simple TSR audio jack can be used for either stereo or balanced audio, headphone or mic or (multiple) line levels, hi-Z instruments, two incompatible MIDI (digital) connectors, multiple incompatible foot controller connectors, etc.

mystifyingpoi•3h ago
XLRs are everywhere and already installed. You could choose cat5 but it's not as common.
derriz•2h ago
That’s my point - reusing an existing connector type for a new and completely incompatible role will not make life easier.

I joked to a friend once that it would be far better if we just used a single connector type for everything in audio and get rid of jacks, XLR, power connectors, MIDI, etc. They liked the idea - I deadpan suggested regular mains plugs and sockets would be good - cheap, ubiquitous and sturdy.

mystifyingpoi•2h ago
That's fair point - I can imagine someone plugging a digital out into analog in, not expecting the hell that's about to break. Probably it sounds like digital noise, not sure about levels.

But the advantage of reusing cabling that already exists in 100% of the venues, stages and churches cannot be overstated. It is literally a drop-in upgrade, boom, now a single cable carries 32 channels instead of 1.

CaptainOfCoit•1h ago
> reusing an existing connector type for a new and completely incompatible role will not make life easier

I don't think it's completely new purpose for XLR, I'm fairly sure I've seen other stuff than audio being pulled through XLR more than once even in professional environments.

LeoWattenberg•3h ago
I've seen XLR used for DMX lighting. The advice for stage techs seems to be "don't do that". Same thing applies to this standard probably.
mystifyingpoi•3h ago
It's the same thing as USB-C, actually. The connector looks the same, but the cable can vary a lot. At least audio cables are labelled.
terinjokes•1h ago
I was a lighting designer for several years and in that time in don't think I ever saw a proper 5-pin DMX512 connector. Even in venues with millions in house lights, the connection backstage to the house was XLR.
yuye•44m ago
The proper DMX512 connector is XLR, though? The 5-pin variant, that is.

I worked as a tech at a stage for a short while. We always used XLR5 for lighting and XLR3 for audio.

anthonyeden•50m ago
Technically DMX needs 110 ohm cable - the connector is less relevant. But most DMX devices are forgiving, and will accept whatever rubbish cable you throw its way.
NoiseBert69•2h ago
XLR with Neutrik Plugs + high quality cables is crazy robust.

You can tow a car with it and then use it to work a festival with Tier 1 bands afterwards without any problems. Most likely it will work even better than before.

Also differential signal nature by design is the standard - It's like CAN. This kills 99% of non-wanted signals coming from the wire physically.

ofalkaed•1h ago
The options for connectors that are robust enough for stage work is limited and the alternatives tend to be expensive since they are no where near as ubiquitous. 1/4" Phono plug and XLR have proven themselves and only take a couple minutes to replace when an accident happens. So we use XLR and Phono everywhere for audio. The real question is why fragile barrel connectors in three different sizes and no wiring standard for power? And now we have just as fragile USB in three different sizes, but at least the wiring is standard. You can't power up but you can still plug it into the board!

It is rare you see anything in the audio world with an XLR that can not survive an accidental encounter with phantom power. People are paranoid about it but for some reason have no issue with phono being use for speaker connects which is far more likely to kill gear. I used to repair audio gear, every bit of gear I encountered that got fried by phantom power had an XLR to TRS in the mix.

lpribis•50m ago
It's already common to put digital data over XLR in stage environments, like DMX lighting and AES3. Also venues will have an XLR snake but definitely not a TRS jack snake from stage to mixer.
sans_souse•3h ago
Behringer will always hold a special place in my heart.
miduil•2h ago
Nice to see that the parent Philippines holding company (Music Tribe) which went on a massive acquisition spree and bought a bunch of specialized audio companies still allows things to be free & open sourced.

(Though just read up that the CEO/Founder of Music Tribe is Uli Behringer)

https://en.wikipedia.org/wiki/Music_Tribe

NoiseBert69•2h ago
Once your company is big enough you have a lot of potential open doors to optimize your company structure. Everyone does this.
charcircuit•2h ago
Are there patents that need to be licensed to use this?
atoav•2h ago
Other digital Audio connection protocols: Toslink, AES50, AES67 (Ravenna), Dante, AVB, AES10 (MADI). Then for stage connection basically every mixer manufacture has their own protocol with Allen Heaths SLink, Soundcraft’s Ultranet/SI Link, Yamaha’s TWINLANe and YGDAI, Roland’s REAC, Avid’s AVB-based Stage 64, and DiGiCo’s Optocore/SD-Rack links...

Most of them use standard CAT cables for this since that is what has been made for the transmission of network data for reasonably long distances. You can replace the RJ-45 plugs with Ethercon connectors if you need it extra rugged and reliable.

Ravenna, AVB and MADI are already existing, open standards that do even more, but I guess they are too expensive because of the ultra low latency requirements and FPGAs involved.

The use of an specialized automotive audio bus IC is interesting and probably gets the cost down, but within a car cable lengths are rarely comparable to what would happen in a concert venue. According to Behringer there is a 15m max cable distance per spec. That is.. too low for practise. Maybe for a small rehearsal room or so, but if you go from a front of house mixer to the stage 15m is nothing, especially if you can't run it the direct way.

Nice of them opening it up still.

formerly_proven•1h ago
Total cable length is 40m, 15m between nodes. Maybe in a non-car environment these can be stretched, because the needed noise margins are lower?

https://www.analog.com/media/en/technical-documentation/data...

dist-epoch•2h ago
Behringer is the Robin Hood of the audio industry - they steal ideas from the expensive companies and remake them cheaply for the poor.
ZenoArrow•1h ago
I don't know why you're being downvoted, that is largely what Behringer is known for, affordable clones of more expensive gear. It's not everything they do, but it's a decent chunk of it. I'm glad they produce audio gear for the masses.
rumori•54m ago
That is one way to look at them. The other is more akin to a parasite, wait for small companies to invest and innovate and once a product is proven in the marketplace, copy it. I don't really want to judge them, cheap music gear is certainly good for consumers but talking to small manufacturers over many years I've yet to meet anyone who likes them. If anything smaller players are now extremely careful to open source stuff exactly because of them.
tgv•18m ago
Many of those instruments are based on 40 to 50 year old designs. They've released products that were simply not in the market anymore, or second-hand at exorbitant prices. That's not parasitic. Their production processes might not stand up to scrutiny, though.

> If anything smaller players are now extremely careful to open source stuff exactly because of them.

That's the problem with all open source. If you open source something good, someone else is going to run with it.

glimshe•1h ago
Behringer is a polarizing company but they revolutionized the electronic music instrument market. I have three of their synths and I'm happy with the purchases.

They brought products that, while not top quality, had decent quality for an unbeatable price. I'm not sure their gear is the best for traveling musicians, but is perfect for the home.

CaptainOfCoit•1h ago
> They brought products that, while not top quality, had decent quality for an unbeatable price

In my mind, Behringer didn't revolutionized anything, but rather iterated their way to fame. None of the stuff they release is really "innovative" except when you consider the price, as your comment allude to.

Not to say that isn't an achievement in itself, to build same quality gear for cheap, but I'm not sure "revolutionized" is a word I'd use to describe them.

glimshe•1h ago
The word has been historically used to represent a new group of people being empowered. And Behringer has empowered poor and hobbyst musicians like no one else in recent memory. That's a revolution in my book.
CaptainOfCoit•34m ago
Huh, I guess my history been different, I always understood "innovative" as something like "new and different".

Making something cheaper can be innovative, depending on how you achieved that. But if you launched a product that is the same as a competitor only because it's cheaper, because your company is funded by VCs who can continuously inject cash to bleed your competitor, I wouldn't call that "innovative" at all.

But if you instead had figured out a way to actually create the same hardware but in a cheaper way, so that's why the price is cheaper, then you did innovative in the creation process, but I still wouldn't call the finished product innovative, I'd be more focused on the process itself.

benediktwerner•27m ago
The word used in the original comment was "revolutionized" and in reference to "the market", not "innovative" and not in reference to product functionality.
friendzis•26m ago
One of you is talking about a technical revolution, that changes what things are or how things are made.

The other is talking about market revolution, where market dynamics change, typically by lowering the price.

motorest•55m ago
> In my mind, Behringer didn't revolutionized anything, but rather iterated their way to fame. None of the stuff they release is really "innovative" except when you consider the price, as your comment allude to.

Your comment reads like "IBM didn't revolutionize anything. None of the stuff they release is really "innovative" except when you consider the price (...)"

CaptainOfCoit•37m ago
Well, did IBM actually bring something new to the market?

As far as I know, IBM did have impressive technical innovations at first, like the Vacuum Tube Multiplier, but then at one point they stopped innovating and instead focused on basically business optimizations.

So yeah, I guess a bit similar to IBM, but that isn't the full story.

thomas_witt•12m ago
I never understood the Behringer hate of the "Pro Audio" community; apparently there are many riders (requirement documents for live shows) which state "No Behringer".

I got a Behringer WING a couple of years ago, and I couldn't be happier for my home studio: Excellent connection with Midas stage boxes who have (at least for my requirements) great pre-amps, you can basically route everything, it's kind of intuitive, the possibilities are endless, it's at the same time a 32-channel USB Audio Interface which works great with Logic, I can even live-stream multi channel audio to my Mac in the other room to Logic using the DANTE card, it has easy live recording with SD cards, remote control via iPad and even 3rd party apps with APIs, etc. etc. etc. … And they just released a rack and smaller version of it, but didn't cut on the features.

As we say in Germany, maybe it's some kind of "What the farmer doesn't know, he won't eat" syndrome. From what I know and use, I am a big fan of Behringer, and especially the WING.

StageConnect: Behringer protocol is open source

https://github.com/OpenMixerProject/StageConnect
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