Audio interfaces and mixers for streaming: which one you actually need
By Elan Harpaz · Published 2026-08-06
Seven boxes from $140 to $700 for the same slot in a build. Most people searching for a mixer need an interface, and a good number need neither.
Your encoder tops out at 1080p60. A higher-end encoder would go further.
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| Component | Pick | Price | |
|---|---|---|---|
| Camera | Logitech MX Brio 4K Sharp 4K webcam with strong low light. The premium plug-and-play pick. Buy on Amazon | $190.99 | Buy on Amazon |
| Audio | Shure SM7B The broadcast standard. Rich, broadcast-grade voice that big streamers run. Buy on Amazon | $439 | Buy on Amazon |
| Interface / Mixer | Focusrite Scarlett Solo (4th Gen) Single-mic version of the 2i2. All most streamers need to run one XLR mic. Buy on Amazon | $159.99 | Buy on Amazon |
| Software | OBS Studio Free, open-source broadcast software. On a PC it is also your encoder, up to 4K with a decent GPU. Learn more | Free | Learn more |
These are two different products competing for one slot. An interface is a converter: XLR goes in, USB comes out, and your computer finally has a microphone. A mixer is a control surface that happens to include a converter, so you can move your game, your music and your mic against each other with your hands while you are live. The searches run together because the boxes look alike on a desk.
| Device | Tracked price | XLR in | Live faders | What it adds |
|---|---|---|---|---|
| Focusrite Scarlett Solo | $140 | 1 | The minimum honest path from one XLR mic to a PC | |
| Cloudlifter CL-1 | $150 | Inline boost | About 25 dB of clean gain ahead of a quiet mic | |
| Elgato Wave XLR | $160 | 1 | A capacitive mute pad and onboard mixing | |
| Focusrite Scarlett 2i2 | $190 | 2 | A second input for a guest or an instrument | |
| GoXLR Mini | $250 | 1 | Faders, in the smallest package that has them | |
| GoXLR | $500 | 1 | A sampler, voice effects, and a broadcast preamp | |
| RODECaster Pro II | $700 | 4 | Four mics, pads, and multitrack recording |
The SM7B problem, worked out
This is the case that sends most people to this page. The Shure SM7B is XLR only and quiet, and its price is quoted everywhere as $373. That number is never what anybody pays. At tracked prices the mic plus a Scarlett Solo is $513, and if your speaking voice is soft you are into a Cloudlifter on top, which is $150 whose entire job is making the signal louder before the preamp has to. The finished chain is $663 for a microphone people describe as $373.
It is still a great chain. It is also a chain, and the honest comparison is not SM7B against another XLR mic, it is $513 against a Shure MV7 at $249 that needs no box at all. Buy the interface because you have decided to run XLR, not because you fell for a $373 sticker.
The right interface for exactly one microphone at $140 tracked. Two inputs you never use is $50 you did not need.
Only if your recorded level is still thin with the preamp near the top. It solves gain, not tone, and it cannot be your only box.
When faders earn $250
A mixer pays for itself when you are riding levels live: a co-host who talks over you, music that has to duck for a story, a game whose explosions bury your voice, a mute you need to hit instantly and be certain about. OBS can do all of that in software, and doing it in software means finding the right slider on a second monitor while something is going wrong on the first. A physical fader is findable without looking. That is the whole value proposition and it is a real one.
The cheapest entry to real faders at $250 tracked. Same core idea as the full GoXLR without the sampler.
The two I would talk you out of
- The GoXLR at $500. Our own catalog note is that it is pricey and hard to find new, so check stock before you plan a build around it. The sampler and voice effects are the reason to want one, and they are entertainment features, not audio quality.
- The RODECaster Pro II at $700. Four XLR inputs and multitrack recording are podcast features: multitrack exists so an editor can fix one voice afterwards, and a live stream has no afterwards. If you record a podcast in the same room, it changes; if you only stream, you are buying three inputs you will not fill.
Frequently asked
Do you need an audio interface for the Shure SM7B?
Yes. The SM7B is XLR only, so something has to convert that signal to USB. At tracked prices the cheapest honest pairing is a Focusrite Scarlett Solo at $140, bringing the chain to $513. A quiet voice may also want a Cloudlifter CL-1 at $150 for about 25 dB more clean gain before the preamp.
What is the difference between an audio interface and a mixer for streaming?
An interface gets one or two XLR microphones into the computer. A mixer does that too and adds live faders, so you can ride the level of your game, your music, your chat and your mic separately while you are live. If you run one mic and one PC, you want an interface.
Do you need a mixer if you use a USB microphone?
No, and most USB mixers cannot take one anyway; they are built around XLR inputs. If your only microphone is USB, the mixing you need is already in OBS, for free.
About this guide. Written by Elan Harpaz. We do not lab-test hardware. Every quality verdict on this page is a planning budget computed from a published model, and every price is a tracked estimate rather than a live one. How the numbers are derived: methodology. How picks are chosen: editorial policy.
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