Three boxes, three jobs
An audio interface has XLR mic inputs with preamps and phantom power, a headphone output and a USB link to the computer. A sound card, usually built into the motherboard, has 3.5 mm jacks for a headset or speakers and a basic mic input. A DAC (often sold as a DAC/amp) turns digital audio into a clean headphone signal and has no mic input.
Do you need an interface?
Yes, if your mic has only an XLR output: nothing else powers it and lifts its level. No, if you use a USB mic or a headset: they have their own converter, and an interface adds cost without changing how friends hear you. A USB/XLR mic works without one until you choose to use its XLR output.
Where a DAC fits
A DAC can make headphones louder and cleaner, which changes what you hear, not how your mic sounds. Many interfaces already include a good headphone output, so with an interface a separate DAC is rarely needed.
Two things gamers trip on
Consoles don't take an audio interface as a chat mic unless the maker says so, so an XLR setup is a PC setup. And with an interface, the interface's headphone jack is where you hear yourself without delay; Windows' own monitoring adds a lag.
Put your choice into a working setup.
Check the exact platform, connection and required controls. Then measure the stand or arm position before adding mounting parts.
References
- Focusrite Scarlett 2i2 4th Gen Checked September 7, 2026