Loopback vs Fader: routing power vs everyday speed

Loopback and Fader solve different problems. Loopback is a virtual-audio-device builder for combining and routing sources — the pro tool you reach for when you need to record or stream app audio. Fader is a keyboard-driven per-app volume mixer for riding app levels fast. If you need to capture, combine, or wire audio between apps, buy Loopback ($99 one-time). If you just want to turn one app down or send it to a different device in a keystroke, Fader ($19.99 one-time) is the faster, cheaper fit.

These two apps get compared because both touch "Mac audio routing," but they sit at opposite ends of the same shelf. One is a patchbay you build and save. The other is a mixer that lives on your keyboard. Picking the wrong one means either paying for power you'll never open, or fighting a recording tool to do a job a light utility does in a second. Here's the honest split.

What Loopback actually does

Loopback, from Rogue Amoeba, is a virtual audio device builder. You open its console, drag in sources — an app like Logic or Safari, a physical input like a microphone or interface — and Loopback stitches them into a single device that the rest of macOS treats as real hardware. A virtual device can carry up to 64 channels, with pass-through and customizable monitoring so you can hear exactly what's flowing through it. It even gives you volume control on each source inside a device, so you can balance a mic against app audio before it leaves.

That's genuinely powerful, and it's why podcasters, streamers, and producers rely on it. Want to record your screen-share audio and your voice into one clean track? Feed a game plus a chat app into OBS as a single input? Send one combined feed to a recorder while monitoring on headphones? That's Loopback's home turf, and few tools do it as cleanly. It's the kind of thing you set up once, save as a device, and leave running.

The trade is that everything happens through building and wiring. Loopback's volume controls live inside a device you constructed; they're for balancing a route, not for reaching over during a call and yanking one app down. It's a studio tool, and it asks studio-level setup for a studio-level payoff.

What Fader actually does

Fader is a per-app volume mixer that lives on letter keys. Hit a toggle hotkey and your keyboard becomes a mixer — one column of keys per app — so you ride Spotify down, push Zoom up, and mute a browser without touching the mouse or hunting through a menu. It also does simple per-app output routing: send music to AirPods, calls to a headset, and alerts to the speakers, each app pinned to its own device. Set it once and forget it.

What Fader deliberately does not do is build virtual devices, combine multiple sources into one feed, or create recording and monitoring chains. There's no patchbay to construct. That's the point: it removes the one friction Loopback carries for everyday use — you never open a console mid-task, because the control is already under your fingers. Fader is $19.99 one-time with a 3-day free trial, and it runs on macOS 14.4 or later.

Loopback vs Fader, side by side

Both are one-time purchases from small Mac studios, and neither is a subscription. The difference is scope and how fast you reach a control.

Read that table as a "what's it for" chart, not a scorecard. Loopback isn't losing when a row says "no" for Fader — it's simply a bigger machine. And Fader's blank rows are features it chose to leave out to stay fast and cheap.

Which one should you buy?

Buy Loopback if you need to capture or combine audio: recording app sound with your mic, feeding a stream, building a virtual device for a DAW, monitoring a route on a separate output. If the phrase "aggregate the app and the interface into one input" describes your problem, Loopback is the right, proven tool, and $99 for a tool you'll lean on daily is fair.

Buy Fader if your real problem is levels: one app's always too loud, you're on calls all day and want music to duck without a menu dive, or you want to keep music on AirPods while calls go to a headset. That's per-app volume and simple routing, and paying $99 — plus the setup time — for a recording-grade tool to do it is more app than the job needs. Fader does it in a keystroke for $19.99.

A useful gut check: if you'd describe what you want as "a mixer I can grab fast," that's Fader. If you'd describe it as "a device I build and route through," that's Loopback. For a wider look at the whole category, see the best per-app volume apps for Mac in 2026, compared.

Can they work together?

Yes, and plenty of people run both. Loopback handles the recording and combining routes you set up for a session; Fader handles the second-to-second volume and device changes across your everyday apps. They don't fight — Loopback's virtual devices show up as outputs, and Fader can route an app to one of them if you want. If routing between devices is your main interest rather than volume, sending one app's audio to a different output on Mac walks through the lighter-weight approach.

A note on being fair to Loopback

Rogue Amoeba makes excellent software, and Loopback has earned its reputation. Nothing here is a knock on it — it does things Fader can't and isn't trying to. The only mistake is buying a virtual audio device builder because you saw "audio routing" and really just wanted to turn one app down. Match the tool to the job and both apps look great.

Bottom line

Loopback is routing power: virtual devices, combining sources, recording and monitoring, for $99 one-time. Fader is everyday speed: per-app volume and simple output routing from your keyboard, for $19.99 one-time. If you record, stream, or combine audio, Loopback. If you just want to ride app levels and send apps to devices without opening anything, that's exactly what Fader is built for.