I believe the Switch's audio port does support mic-in, plus reasons for app? : r/NintendoSwitch
Amazon.com: PDP Gaming LVL40 Stereo Headset with Mic for Nintendo Switch - PC, iPad, Mac, Laptop Compatible - Noise Cancelling Microphone, Lightweight, Soft Comfort On Ear Headphones - Mario Red & Blue :
If you own a SoundBlasterX G6, here's how to combine Game Audio with Discord Audio (Phone App) : r/NintendoSwitch
Nintendo USB Wireless Microphone Heading To Japan - NintendoSoup
How to Use a Mic on Nintendo Switch - Nintendo Switch Wiki Guide - IGN
How to Voice Chat on Your Nintendo Switch (With a Phone) | PCMag
Recon 70 Gaming Headset for Nintendo Switch™ – Turtle Beach®
How to set up a microphone for the Nintendo Switch | Tab-TV
Gaming Headset for Nintendo Switch, Xbox One, PS4, PS5, Bass Surround and Noise Cancelling with Flexible Mic, 3.5mm Wired Adjustable Over-Ear Headphones for Laptop PC iPad Smartphones (Blue-Black) : Video Games
Can I use the Nintendo Switch online app for voice chat on Fortnite? - Quora
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These games support voice chat on the Nintendo Switch - The Verge
Use your Nintendo Switch with a Audio Interface, PC Audio and Desktop Microphone for Voice Chat, Discord and more : r/NintendoSwitch
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How to Set up and Use a Nintendo Switch Microphone
HOW TO USE *ANY* PROFESSIONAL MICROPHONE ON YOUR SWITCH FOR VOICE CHAT! + COMPARISON - YouTube
➤ How to set up and activate Nintendo switch microphone? 🕹
How to Voice Chat on the Nintendo Switch: 15 Steps (with Pictures)
Nintendo Switch Fortnite Mic Support Here! - YouTube
How to Voice Chat on the Nintendo Switch: 15 Steps (with Pictures)
See? It supports microphones. Now breathe. (Screenshot from Nintendo.co.uk) : r/NintendoSwitch
How to use FORTNITE VOICE CHAT on Nintendo SWITCH (Easy Method) - YouTube
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How to Set up and Use a Nintendo Switch Microphone
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How to Use Nintendo Switch Voice Chat
How to Voice Chat in Nintendo Switch Games
How to use the Nintendo Switch Online app for Switch voice chat
How to monitor your kids' online experience on the Nintendo Switch (like Fortnite voice chat) | Code Dojo
