A loopback audio interface lets you capture system/app audio (music, guests, games) and your microphone into one clean feed for OBS, Streamlabs, Zoom, Discord, or DAWs. Below are the best picks by workflow, plus copy-paste setup recipes.
Also see: Best Audio Interfaces for Streaming • Zero-Latency Monitoring • Driver Comparison: RME vs MOTU vs UA vs Focusrite
Editor’s Picks (Card View)
Focusrite Scarlett 2i2 / Solo (4th Gen)
Best budget loopback for streamers & podcasters
- Loopback: Native software mix bus
- Monitoring: Direct monitor (Input↔Playback blend)
- I/O: 2x combo (2i2) / 1x XLR (Solo), 1x HP out
- Extras: Air, Pad, easy drivers
Why: Easiest entry to loopback workflows; perfect for OBS + Zoom bed music.
MOTU M2
Lowest latency in class + big meters
- Loopback: Via driver/OS (Mac CoreAudio, Windows WDM)
- Monitoring: Hardware/direct monitor
- Strength: Class-leading roundtrip latency, crisp LCD meters
Why: If you perform instruments/VIs live and want visual level confidence.
RME Babyface Pro FS
Routing powerhouse for pros & 24/7 streams
- Loopback: TotalMix FX per-bus loopback
- Monitoring: DSP mixer, per-output mixes
- Drivers: Industry-leading stability
Why: Bulletproof drivers + surgical routing; complex shows & multi-bus needs.
Universal Audio Apollo Twin X
Zero-latency DSP vocal chains
- Loopback: Virtual channels in UA Console
- Monitoring: Unison preamps, DSP EQ/Comp/Reverb
- Best for: Polished, broadcast-ready voice on the way in
Why: Real-time FX with no feel of delay; premium sound and workflow.
RØDECaster Pro II
All-in-one podcast & stream desk
- Loopback: Multi-USB class-compliant + virtual channels
- I/O: 4x XLR, pads, phone/BT I/O, headphone outs
- Extras: Onboard APHEX processing, mix-minus
Why: Roundtables, call-ins, and sound pads without extra software.
Loopback: How It Actually Works
- Native loopback: Interface exposes a “virtual input” that sums Mic + System (e.g., Scarlett Loopback, RME Loopback bus).
- Virtual channels: Extra driver inputs you route to in the mixer app (UA Console Virtual 1–2 / 3–4).
- OS/software loopback: Use CoreAudio/WDM or utilities if hardware lacks native support.
Copy-Paste Setup Recipes
A) OBS + Music Bed (Scarlett 4th Gen)
- Open Focusrite Control → set Loopback mix = Mic 1–2 + System.
- Enable Direct Monitor for latency-free vocals.
- OBS → Mic/Aux: Scarlett Loopback. Add game/app audio as needed.
B) Zoom/Discord + Spotify (RME Babyface)
- In TotalMix FX, pick an unused output pair; build a custom mix (Mic + Music).
- Enable Loopback on that output; it becomes a record source.
- Zoom Mic = Babyface (Loopback). Your cue mix stays separate.
C) Polished Solo Stream with FX (Apollo Twin X)
- UA Console: Unison pre (HPF + light Comp). Send to Virtual 1–2.
- Music/app → Virtual 3–4. Balance in Console, not OBS.
- OBS Mic = Virtual 1–2; Desktop = Virtual 3–4. Monitor through Console for zero-latency.
Choosing the Right Loopback Interface
| Priority | Pick | Reason |
|---|---|---|
| Budget + simplicity | Scarlett Solo/2i2 (4th Gen) | Easy native loopback & direct monitor |
| Low latency performance | MOTU M2 | Top roundtrip latency; big meters |
| Advanced routing | RME Babyface Pro FS | TotalMix per-bus loopback + elite drivers |
| Onboard vocal polish | Apollo Twin X | DSP FX + virtual channels |
| Podcast desk / call-ins | RØDECaster Pro II | All-in-one pads, mix-minus, multitrack USB |
FAQ
My audience hears echo/feedback—why? You’re likely routing the stream return back into the loopback bus. Remove “monitor” of the live stream from the loopback mix.
Do I need loopback if I only record vocals? No. It’s mainly for mixing computer audio with your mic (music, calls, games, tutorials).
Is software loopback OK? Yes—but native loopback is simpler and less error-prone under CPU load.
