XR18 USB Audio: Send and Receive 18 Channels with One Cable

If you run a Behringer XR18, there’s a good chance you’re about to buy an audio interface you don’t need. The question comes up constantly: “How do I get ProPresenter audio into the mixer?” or “How do I get my mix into the streaming computer?” And the answer is usually already sitting on the back of your XR18.

One USB cable between the mixer and your computer moves 18 channels of audio in each direction. That’s your walk-in music going in, your live stream mix coming back, and a full multitrack recording of Sunday — all on the cable you already own.

Here’s the quick version, then we’ll walk through the details.

Prefer YouTube? Watch this video on the channel.

What That One USB Cable Actually Carries

The XR18 isn’t just a mixer with a USB port for firmware updates — it’s a full 18-in / 18-out USB audio interface. Plug it into your computer and the computer sees the mixer as a sound device, the same way it would see a Scarlett or any other interface.

That means two things at once:

• Into the mixer: the computer’s audio shows up on the XR18 as USB playback channels, ready to be assigned to faders like any other input.
• Out of the mixer: any mix you build — the main left/right, or a dedicated bus — can be sent back up the same cable into the computer.

Both directions, at the same time, on one cable. (Everything here applies to the Midas MR18 too — same engine, different preamps.)

Sending Computer Audio INTO the XR18

This is the walk-in music and ProPresenter problem. Whatever your computer plays — Spotify, ProPresenter audio cues, backing tracks — comes down the USB cable on the playback channels, and you assign those to channels on the mixer.

Now the computer’s audio has a fader, EQ, and mute button like everything else on stage. No headphone-jack-to-DI-box workaround, no hum, no fiddling with output volume on the computer to set your level.

Getting Your Stream Mix BACK to the Computer

Going the other direction, you send audio from the mixer up to the computer for your live stream. And here’s where I’ll add one strong opinion: don’t send the room mix.

Your house mix is built for your room — it leans on the acoustics, the drums bleeding in naturally, the congregation singing. Online listeners get none of that, which is why a stream fed from the house mix sounds thin and vocal-heavy. Build a dedicated stream mix on its own bus, fed independently from every channel, and send THAT bus back over USB. (I’ve written a whole guide on why church live stream audio sounds bad if you want to go deeper.)

If you’re just getting started, sending the main left/right back over USB still beats a camera microphone by a mile. But the dedicated stream bus is where you want to end up.

When You Actually DO Need a Separate Interface

There’s exactly one common reason to add an interface like the Scarlett 2i2 to an XR18 rig: distance and separation.

A USB cable only reaches so far. If your streaming computer is a different machine than the one already using the XR18’s USB connection — say, ProPresenter has the USB feed and the stream runs from a second computer across the room — then run XLR outputs from the XR18 to a small interface at the streaming computer.

And sometimes you can skip the interface entirely: if your video switcher has XLR audio inputs, go straight in. If it’s an ATEM with mini-jack inputs, a simple XLR-to-3.5mm cable does the job.

The Bonus Nobody Talks About: 18-Track Recording

Because all 18 channels ride the USB connection individually, your computer can record every input as its own track — the whole band, every mic, every Sunday. That’s a virtual soundcheck waiting to happen: play the multitrack back through the console on a Tuesday night and mix the worship set with nobody on stage.

If You Outgrow the XR18

The XR18 is a fantastic box, and for a lot of portable setups and smaller rooms it’s all you need. When a church steps up to an X32, M32, or WING — more channels, a real control surface, stage boxes — the setup work gets bigger too. That’s exactly what ShowBuilder is for: answer a few questions about your hardware and it builds your whole show file automatically. Free to start, from $49 to download your .scn (X32/M32) or .snap (WING) file.

Related

• Why Your Church Live Stream Audio Sounds Bad (and How to Fix It)
• X32 USER Input & Output Routing: Send Any Source to Any Channel
• X32-EDIT & M32-EDIT: Control Your X32 From a Computer

More church audio training on my YouTube channel: Youtube.com/@CrazyAmazingDesigns.