Ultimate Best Audio Interfaces for Streaming in 2026

Upgrading to the best audio interfaces for streaming ensures crystal-clear microphone quality, zero-latency monitoring, and seamless Discord audio routing.

Our Top Products Picks

M-AUDIO M-Track Solo USB Audio Interface for Recording, Streaming and Podcasting with XLR, Line and DI Inputs, Plus a Software Suite Included

M-AUDIO M-Track Solo USB Audio Interface for Recording, Streaming and Podcasting with XLR, Line and DI Inputs, Plus a Software Suite Included

M-AUDIO

Podcast, Record, Live Stream, This Portable Audio Interface Covers it All - USB sound card for Mac or PC delivers 48kHz audio resolution for pristine recording every time Be ready for anything with this versatile M-AUDIO interface - Record guitar, vocals or line input signals with one combo XLR / Line Input with phantom power and one Line / Instrument input Everything you Demand from an Audio Interface for Fuss-Free Monitoring - 1/8" headphone output and stereo RCA outputs for total monitoring flexibility; USB/Direct switch for zero latency monitoring Get the best out of your Microphones - M-Track Solo’s transparent Crystal Preamp guarantees optimal sound from all your microphones including condenser mics The MPC Production Experience - Includes MPC Beats Software complete with the essential production tools from Akai Professional

Focusrite Scarlett Solo 3rd Gen USB Audio Interface for Guitarists, Vocalists, Podcasters or Producers to record and playback studio quality sound

Focusrite Scarlett Solo 3rd Gen USB Audio Interface for Guitarists, Vocalists, Podcasters or Producers to record and playback studio quality sound

Focusrite

Pro performance with great pre-amps - Achieve a brighter recording thanks to the high performing mic pre-amps of the Scarlett 3rd Gen. A switchable Air mode will add extra clarity to your acoustic instruments when recording with your Solo 3rd Gen Get the perfect guitar and vocal take with - With two high-headroom instrument inputs to plug in your guitar or bass so that they shine through. Capture your voice and instruments without any unwanted clipping or distortion thanks to our Gain Halos Studio quality recording for your music & podcasts - Achieve pro sounding recordings with Scarlett 3rd Gen’s high-performance converters enabling you to record and mix at up to 24-bit/192kHz. Your recordings will retain all of their sonic qualities Low-noise for crystal clear listening - 2 low-noise balanced outputs provide clean audio playback with 3rd Gen. Hear all the nuances of your tracks or music from Spotify, Apple & Amazon Music. Plug-in headphones for private listening in high-fidelity Everything in the box: Includes Pro Tools Intro+, Ableton Live Lite, Cubase LE, and Hitmaker Expansion: a suite of essential effects, powerful software instruments, and easy-to-use mastering tools. With Scarlett 3rd Gen, you have all the tools you need to start recording right, now - We’ve partnered with our favorite industry partners to provide you with plenty of sound content and software so that you can create and record music right away Enjoy three years of warranty - Wherever you happen to be in the world, you can rely on a three-year warranty if any Focusrite hardware needs repairing or replacing due to a manufacturing fault

M-AUDIO M-Track Duo USB Audio Interface for Recording, Streaming and Podcasting with Dual XLR, Line and DI Inputs, plus a Software Suite Included

M-AUDIO M-Track Duo USB Audio Interface for Recording, Streaming and Podcasting with Dual XLR, Line and DI Inputs, plus a Software Suite Included

M-AUDIO

Podcast, Record, Live Stream, This Portable Audio Interface Covers it All - USB sound card for Mac or PC delivers 48kHz audio resolution for pristine recording every time Be ready for anything with this versatile M-AUDIO interface - Record guitar, vocals or line input signals with two combo XLR / Line / Instrument Inputs with phantom power Everything you Demand from an Audio Interface for Fuss-Free Monitoring - 1/4" headphone output and stereo 1/4" outputs for total monitoring flexibility; USB/Direct switch for zero latency monitoring Get the best out of your Microphones - M-Track Duo’s transparent Crystal Preamps guarantee optimal sound from all your microphones including condenser mics The MPC Production Experience - Includes MPC Beats Software complete with the essential production tools from Akai Professional

IK Multimedia iRig 2 portable guitar audio interface, lightweight audio adapter for iPhone and iPad with instrument input and headphone/amplfier outs

IK Multimedia iRig 2 portable guitar audio interface, lightweight audio adapter for iPhone and iPad with instrument input and headphone/amplfier outs

IK Multimedia

PLUG AND PLAY SIMPLICITY ON EVERY DEVICE: Adjustable gain dial, which works with its built-in 1/8"" TRRS output connector to give you a true plug-and-play experience with your iPhone, iPad, iPod touch or Mac. CONNECT TO AMPLIFIER WITHOUT ADDITIONAL ACCESSORIES: iRig 2's new 1/4” output jack lets you use iRig 2 with an amplifier as a part of your live rig without the use of an adaptor. CONNECT TO ANY APPLE DEVICE: Use a Apple-brand USB-C to 3.5mm Headphone Jack Adapter to ensure compatibility with newer iOS devices— Easily record high-quality audio right to your mobile device. Use the built-in 1/8" headphone output or 1/4" amplifier output to listen to audio with headphones or amplifier. ROCK WITH iRig 2: Paired with AmpliTube CS (free) for iOS, IK's powerful guitar and bass multi-effects processor. AmpliTube CS provides you with a vast library of meticulously modeled virtual stompbox effects, amplifiers. EVEN BETTER: iRig 2 features a switch that lets you select between a processed signal and a clean "thru" input signal. This means you can also use your mobile device as a tuner, recorder or other tool while preserving the purity of a 100% analog signal path.

If you want to sound professional on Twitch, YouTube, or podcast platforms, finding the best audio interfaces for streaming is your mandatory first step. As we settle into 2026, the days of relying on a flimsy USB headset mic are officially over. Your audience expects pristine voice clarity, zero-latency monitoring, and perfect audio routing between your game, OBS, and voice chat. But navigating the sea of XLR inputs, phantom power, and sample rates can feel overwhelming for newcomers looking to upgrade their broadcast quality.

That is exactly why I built The Ultimate Audiophile Beginner’s Guide: From Zero to Hi-Fi. Think of this hardware breakdown as your practical extension of those foundational principles. We are going to explore how to match a quality interface to your specific streaming environment, avoiding the common trap of throwing money at an expensive DAC when your room acoustics or routing software are the actual bottlenecks. Let's look at the gear that actually performs, devoid of marketing fluff and gatekeeping jargon.

The 2026 Streaming Audio Cheat Sheet & Key Takeaways

The 2026 Streaming Audio Cheat Sheet & Key Takeaways — best audio interfaces for streaming

Key Takeaways:

  • Best Overall Value: Focusrite Scarlett Solo 3rd Gen (The enduring standard for solo creators).
  • Best Ultra-Budget Entry: M-AUDIO M-Track Solo (Under $50, perfect for single-mic setups).
  • Best for Dual-PC/Co-op Streams: M-AUDIO M-Track Duo (Two XLR inputs for under $70).
  • Best for IRL & Mobile Streaming: IK Multimedia iRig 2 (Flawless iOS integration).

Before you buy a single piece of hardware, you need to understand system matching. An audio interface acts as the brain of your setup, translating analog sound waves (your voice) into digital data (USB audio) and routing it to your viewers. However, buying a high-end interface will not magically fix a cheap microphone or poor room acoustics.

Your signal chain is only as strong as its weakest link. If you pair a premium microphone with a noisy, unshielded motherboard audio jack, you get electronic buzzing and muddy low-mids. An external interface removes the audio processing from your PC's internal interference, providing dedicated preamps that amplify your microphone cleanly. This is why transitioning from consumer USB mics to an XLR interface setup remains the most noticeable quality jump a streamer can make.

Focusrite Scarlett Solo 3rd Gen: The Enduring Standard

Even as newer iterations flood the market in 2026, the Focusrite Scarlett Solo 3rd Gen remains the undisputed benchmark for beginner to intermediate streaming setups. Priced around $110, it offers a stunning balance of reliable drivers, robust build quality, and pristine sound conversion. The iconic red aluminum chassis houses a high-performing microphone preamp capable of delivering up to 24-bit/192kHz resolution. This translates to an incredibly transparent, clinical sound that captures every nuance of your voice without adding unwanted coloration.

The standout feature for streamers is the switchable 'Air' mode. When engaged, it mimics the frequency response of Focusrite's classic ISA console preamps, adding a sparkling, airy lift to the high frequencies. This is particularly useful for darker, dynamic microphones, instantly making your vocals cut through a dense game audio mix. The gain halos-LED rings around the volume knobs that flash red if your audio clips-are foolproof visual indicators that keep your stream from distorting when you suddenly yell during a horror game.

Who Should Avoid It: Streamers who use notoriously gain-hungry dynamic microphones (like the Shure SM7B) without an inline preamp, as the Scarlett Solo's gain might max out and introduce a slight hiss.

Feature/AspectProsCons
PreampsExtremely clean, high headroom, Air mode adds vocal clarityMaximum gain may require an inline lifter for certain dynamic mics
Build & DesignTank-like metal chassis, intuitive Gain Halo visual feedbackSingle XLR input limits multi-person podcasts
ValueExcellent software bundle (Ableton Live Lite, Hitmaker Expansion)Older generation hardware, though still highly relevant

M-AUDIO M-Track Solo and Duo: The Budget Champions

If you are building your stream setup on a strict budget, M-AUDIO completely disrupts the market with the M-Track Solo ($49) and M-Track Duo ($69). In previous years, an interface under $50 usually meant suffering through severe background hiss and fragile plastic knobs. The M-Track series defies this expectation, providing surprisingly transparent 'Crystal Preamps' that handle standard condenser and dynamic microphones with ease.

The M-Track Solo offers a single XLR/Line combo input and a dedicated instrument input, making it perfect for solo gamers and bedroom producers. It pushes a 48kHz audio resolution, which is the exact broadcast standard required by OBS, Twitch, and YouTube. For an extra $20, the M-Track Duo adds a second XLR input, making it the cheapest viable option for two-person couch co-op streams or live podcasting. Both units feature a crucial USB/Direct switch, allowing you to monitor your microphone in your headphones with zero latency before it hits your computer.

Who Should Avoid It: Audiophiles looking to drive high-impedance headphones (like 300-ohm Sennheisers). The headphone outputs on these budget units are designed for standard consumer headphones and will struggle to provide enough volume for demanding audiophile gear.

Feature/AspectProsCons
Price to PerformanceUnbeatable entry price, transparent Crystal PreampsAll-plastic chassis feels lightweight compared to metal rivals
ConnectivityDuo offers dual XLR inputs for under $70RCA outputs on the Solo model instead of balanced 1/4-inch
MonitoringZero-latency direct monitoring switchHeadphone amp lacks the power for high-impedance headphones

IK Multimedia iRig 2: Best for Mobile and IRL Streaming

The streaming landscape in 2026 is not confined to desktop PCs. IRL (In Real Life) streaming and mobile broadcasting on platforms like TikTok and Instagram Live require a completely different approach to audio routing. The IK Multimedia iRig 2 ($39.99) is an ingenious, pocket-sized solution that bridges professional audio gear with your smartphone or tablet.

While originally designed for guitarists, clever streamers use the iRig 2 to route clean audio directly into their iOS or Android devices. It features an adjustable gain dial to perfectly level your input, and an integrated 1/8-inch TRRS connector that acts as a true plug-and-play solution. A standout addition to this iteration is the 1/4-inch amplifier output. This allows you to route your processed audio out to external speakers or a dedicated streaming PC while simultaneously recording on your phone. It even features a 'thru' switch to pass a completely clean, uncolored analog signal if you want to apply digital effects later.

Who Should Avoid It: Desktop-centric PC gamers. This is a specialized tool for mobile broadcasters, traveling musicians, and IRL streamers. If you stream from a stationary Windows PC, a standard USB interface is much more practical.

Feature/AspectProsCons
PortabilityUltra-lightweight, fits in a pocket, bus-poweredRequires a USB-C/Lightning dongle for modern phones lacking headphone jacks
FlexibilityFX/Thru switch for clean or processed signal routingNo built-in phantom power for condenser microphones
SoftwareIncludes AmpliTube CS for vast digital effects modelingPrimarily tailored toward instrument inputs rather than broadcast mics

Deciphering the Jargon: DACs, Amps, and Audio Science

As you move from consumer audio into audiophile territory, the terminology can feel aggressive. Let's strip away the gatekeeping. A DAC (Digital-to-Analog Converter) takes the 1s and 0s from your computer and turns them into an electrical wave your speakers can play. Every interface has a built-in DAC. An Amp (Amplifier) simply takes that weak electrical signal and gives it enough power to physically push the drivers in your headphones.

You will often hear about 'Impedance.' Think of impedance like a heavy oak door. A standard pair of gaming headphones has low impedance (a light door) and can be pushed open easily by a cheap amplifier. High-end audiophile headphones have high impedance (a heavy oak door) and require a dedicated, muscular amplifier to swing them open and deliver punchy transient response.

Let's also address a persistent myth: expensive digital USB cables do not make your stream sound warmer or richer. In the digital realm, cables transmit data packets. As long as the cable meets basic shielding standards to prevent dropouts, a $100 USB cable sounds exactly the same as a $10 Amazon Basics cable. Invest your budget into your microphone and room acoustic treatment, not snake-oil wiring.

Fixing the Real Enemy: OBS and Discord Audio Routing

You can own the most expensive interface on the market, but if your software routing is flawed, your viewers will hear nothing. A massive point of failure for new streamers is Discord and OBS synchronization. When screen sharing on Discord, users frequently encounter the dreaded 'no sound' issue. This usually happens because Discord's voice engine struggles to capture audio from applications running in exclusive mode.

To fix Discord stream audio issues, first check your Windows Sound settings and ensure your interface's USB output is set as the 'Default Communications Device.' Inside Discord, navigate to Voice & Video, and disable 'Use our latest technology to capture screen.' This forces Discord into a legacy capture mode that is far more reliable for game audio.

For OBS, if your microphone audio is not showing in the preview mixer, you likely have a sample rate mismatch. If your Focusrite or M-Audio interface is set to 48kHz in its driver control panel, but OBS is trying to pull audio at 44.1kHz, the software will silently fail to capture the mic. Always align your Windows sound settings, interface drivers, and OBS audio settings to a unified 48kHz to guarantee a stable, sync-perfect stream.

Building a reliable, high-fidelity broadcast setup does not require emptying your bank account. The core foundation of a great stream rests on clean gain, zero-latency monitoring, and stable software routing. Whether you opt for the proven reliability of the Focusrite Scarlett Solo or the aggressive budget value of the M-AUDIO M-Track series, moving to a dedicated XLR interface completely elevates your production value.

Stop fighting with USB microphone drivers and software-based noise suppression that makes you sound like you are broadcasting from underwater. Take control of your signal chain, dial in your microphone technique, and focus on what actually matters: creating incredible content for your audience. Your viewers' ears will thank you.

Our Top Picks

M-AUDIO M-Track Solo USB Audio Interface for Recording, Streaming and Podcasting with XLR, Line and DI Inputs, Plus a Software Suite Included
M-AUDIO

M-AUDIO M-Track Solo USB Audio Interface for Recording, Streaming and Podcasting with XLR, Line and DI Inputs, Plus a Software Suite Included

Podcast, Record, Live Stream, This Portable Audio Interface Covers it All - USB sound card for Mac or PC delivers 48kHz audio resolution for pristine recording every time Be ready for anything with this versatile M-AUDIO interface - Record guitar, vocals or line input signals with one combo XLR / Line Input with phantom power and one Line / Instrument input Everything you Demand from an Audio Interface for Fuss-Free Monitoring - 1/8" headphone output and stereo RCA outputs for total monitoring flexibility; USB/Direct switch for zero latency monitoring Get the best out of your Microphones - M-Track Solo’s transparent Crystal Preamp guarantees optimal sound from all your microphones including condenser mics The MPC Production Experience - Includes MPC Beats Software complete with the essential production tools from Akai Professional

Key Features

  • Podcast, Record, Live Stream, This Portable Audio Interface Covers it All - USB sound card for Mac or PC delivers 48kHz audio resolution for pristine recording every time
  • Be ready for anything with this versatile M-AUDIO interface - Record guitar, vocals or line input signals with one combo XLR / Line Input with phantom power and one Line / Instrument input
  • Everything you Demand from an Audio Interface for Fuss-Free Monitoring - 1/8" headphone output and stereo RCA outputs for total monitoring flexibility; USB/Direct switch for zero latency monitoring
  • Get the best out of your Microphones - M-Track Solo’s transparent Crystal Preamp guarantees optimal sound from all your microphones including condenser mics

Specifications

ColorBlack
Size48kHz / 1 XLR in
Unit Count1
$49.00
Check on Amazon
Free delivery available • Prime eligible
Focusrite Scarlett Solo 3rd Gen USB Audio Interface for Guitarists, Vocalists, Podcasters or Producers to record and playback studio quality sound
Focusrite

Focusrite Scarlett Solo 3rd Gen USB Audio Interface for Guitarists, Vocalists, Podcasters or Producers to record and playback studio quality sound

Pro performance with great pre-amps - Achieve a brighter recording thanks to the high performing mic pre-amps of the Scarlett 3rd Gen. A switchable Air mode will add extra clarity to your acoustic instruments when recording with your Solo 3rd Gen Get the perfect guitar and vocal take with - With two high-headroom instrument inputs to plug in your guitar or bass so that they shine through. Capture your voice and instruments without any unwanted clipping or distortion thanks to our Gain Halos Studio quality recording for your music & podcasts - Achieve pro sounding recordings with Scarlett 3rd Gen’s high-performance converters enabling you to record and mix at up to 24-bit/192kHz. Your recordings will retain all of their sonic qualities Low-noise for crystal clear listening - 2 low-noise balanced outputs provide clean audio playback with 3rd Gen. Hear all the nuances of your tracks or music from Spotify, Apple & Amazon Music. Plug-in headphones for private listening in high-fidelity Everything in the box: Includes Pro Tools Intro+, Ableton Live Lite, Cubase LE, and Hitmaker Expansion: a suite of essential effects, powerful software instruments, and easy-to-use mastering tools. With Scarlett 3rd Gen, you have all the tools you need to start recording right, now - We’ve partnered with our favorite industry partners to provide you with plenty of sound content and software so that you can create and record music right away Enjoy three years of warranty - Wherever you happen to be in the world, you can rely on a three-year warranty if any Focusrite hardware needs repairing or replacing due to a manufacturing fault

Key Features

  • Pro performance with great pre-amps - Achieve a brighter recording thanks to the high performing mic pre-amps of the Scarlett 3rd Gen. A switchable Air mode will add extra clarity to your acoustic instruments when recording with your Solo 3rd Gen
  • Get the perfect guitar and vocal take with - With two high-headroom instrument inputs to plug in your guitar or bass so that they shine through. Capture your voice and instruments without any unwanted clipping or distortion thanks to our Gain Halos
  • Studio quality recording for your music & podcasts - Achieve pro sounding recordings with Scarlett 3rd Gen’s high-performance converters enabling you to record and mix at up to 24-bit/192kHz. Your recordings will retain all of their sonic qualities
  • Low-noise for crystal clear listening - 2 low-noise balanced outputs provide clean audio playback with 3rd Gen. Hear all the nuances of your tracks or music from Spotify, Apple & Amazon Music. Plug-in headphones for private listening in high-fidelity

Specifications

ColorRed
SizePack of 1
Unit Count1
$110.00
Check on Amazon
Free delivery available • Prime eligible
M-AUDIO M-Track Duo USB Audio Interface for Recording, Streaming and Podcasting with Dual XLR, Line and DI Inputs, plus a Software Suite Included
M-AUDIO

M-AUDIO M-Track Duo USB Audio Interface for Recording, Streaming and Podcasting with Dual XLR, Line and DI Inputs, plus a Software Suite Included

Podcast, Record, Live Stream, This Portable Audio Interface Covers it All - USB sound card for Mac or PC delivers 48kHz audio resolution for pristine recording every time Be ready for anything with this versatile M-AUDIO interface - Record guitar, vocals or line input signals with two combo XLR / Line / Instrument Inputs with phantom power Everything you Demand from an Audio Interface for Fuss-Free Monitoring - 1/4" headphone output and stereo 1/4" outputs for total monitoring flexibility; USB/Direct switch for zero latency monitoring Get the best out of your Microphones - M-Track Duo’s transparent Crystal Preamps guarantee optimal sound from all your microphones including condenser mics The MPC Production Experience - Includes MPC Beats Software complete with the essential production tools from Akai Professional

Key Features

  • Podcast, Record, Live Stream, This Portable Audio Interface Covers it All - USB sound card for Mac or PC delivers 48kHz audio resolution for pristine recording every time
  • Be ready for anything with this versatile M-AUDIO interface - Record guitar, vocals or line input signals with two combo XLR / Line / Instrument Inputs with phantom power
  • Everything you Demand from an Audio Interface for Fuss-Free Monitoring - 1/4" headphone output and stereo 1/4" outputs for total monitoring flexibility; USB/Direct switch for zero latency monitoring
  • Get the best out of your Microphones - M-Track Duo’s transparent Crystal Preamps guarantee optimal sound from all your microphones including condenser mics

Specifications

ColorBlack
SizeAudio Interface
Unit Count1
$69.00
Check on Amazon
Free delivery available • Prime eligible
IK Multimedia iRig 2 portable guitar audio interface, lightweight audio adapter for iPhone and iPad with instrument input and headphone/amplfier outs
IK Multimedia

IK Multimedia iRig 2 portable guitar audio interface, lightweight audio adapter for iPhone and iPad with instrument input and headphone/amplfier outs

PLUG AND PLAY SIMPLICITY ON EVERY DEVICE: Adjustable gain dial, which works with its built-in 1/8"" TRRS output connector to give you a true plug-and-play experience with your iPhone, iPad, iPod touch or Mac. CONNECT TO AMPLIFIER WITHOUT ADDITIONAL ACCESSORIES: iRig 2's new 1/4” output jack lets you use iRig 2 with an amplifier as a part of your live rig without the use of an adaptor. CONNECT TO ANY APPLE DEVICE: Use a Apple-brand USB-C to 3.5mm Headphone Jack Adapter to ensure compatibility with newer iOS devices— Easily record high-quality audio right to your mobile device. Use the built-in 1/8" headphone output or 1/4" amplifier output to listen to audio with headphones or amplifier. ROCK WITH iRig 2: Paired with AmpliTube CS (free) for iOS, IK's powerful guitar and bass multi-effects processor. AmpliTube CS provides you with a vast library of meticulously modeled virtual stompbox effects, amplifiers. EVEN BETTER: iRig 2 features a switch that lets you select between a processed signal and a clean "thru" input signal. This means you can also use your mobile device as a tuner, recorder or other tool while preserving the purity of a 100% analog signal path.

Key Features

  • PLUG AND PLAY SIMPLICITY ON EVERY DEVICE: Adjustable gain dial, which works with its built-in 1/8"" TRRS output connector to give you a true plug-and-play experience with your iPhone, iPad, iPod touch or Mac.
  • CONNECT TO AMPLIFIER WITHOUT ADDITIONAL ACCESSORIES: iRig 2's new 1/4” output jack lets you use iRig 2 with an amplifier as a part of your live rig without the use of an adaptor.
  • CONNECT TO ANY APPLE DEVICE: Use a Apple-brand USB-C to 3.5mm Headphone Jack Adapter to ensure compatibility with newer iOS devices— Easily record high-quality audio right to your mobile device. Use the built-in 1/8" headphone output or 1/4" amplifier output to listen to audio with headphones or amplifier.
  • ROCK WITH iRig 2: Paired with AmpliTube CS (free) for iOS, IK's powerful guitar and bass multi-effects processor. AmpliTube CS provides you with a vast library of meticulously modeled virtual stompbox effects, amplifiers.

Specifications

Unit Count1
$39.99
Check on Amazon
Free delivery available • Prime eligible

Frequently Asked Questions

Do I need a mixer or an audio interface for streaming?
An audio interface is generally better for solo streamers because it converts your mic signal to digital data with pristine quality. A mixer is only necessary if you are balancing multiple live microphones, instruments, and hardware sound effects simultaneously before sending the mixed track to your PC.
Why is my Discord stream audio not working through my interface?
This is usually caused by Windows exclusive mode settings or sample rate mismatches. Ensure your audio interface is set as the default device in Windows, and disable 'Use our latest technology to capture screen' in Discord's Voice & Video settings to force a more stable audio capture.
Can I plug my gaming headset directly into an XLR audio interface?
Most audio interfaces feature a 1/4-inch headphone output, meaning you will need a cheap 1/8-inch to 1/4-inch adapter to plug in a standard gaming headset. Keep in mind that an interface will only drive the headphones; you cannot route a headset's attached boom mic through the headphone jack.
What is phantom power and do I need it for streaming?
Phantom power (often labeled as +48V) is an electrical current sent through an XLR cable to power active microphones. You absolutely need it if you are using a condenser microphone, but you should keep it turned off if you are using a standard dynamic microphone or a ribbon mic.
How do I route console game audio into my PC streaming interface?
To stream PlayStation or Xbox audio through your PC, you need a capture card. Route the console's HDMI through the capture card, pull that audio source into OBS, and use your audio interface's headphone jack to monitor the combined OBS output.
Are expensive XLR cables worth it for a budget setup?
No. While extremely cheap, unshielded cables can pick up radio interference, any well-constructed, basic XLR cable from a reputable brand will sound identical to a luxury cable. Spend your money on a better microphone instead of premium cables.