Can You Connect a USB Microphone to an Audio Interface?

In most cases, no. A USB microphone already contains its own preamp and analog-to-digital converter, so it is effectively a small audio interface. It sends digital audio straight to a computer. A typical audio interface has XLR, line or instrument inputs that expect an analog signal, and its USB port connects to the computer rather than accepting audio from another USB device. There are two practical alternatives. If your microphone also has an XLR output, you can plug that into the interface. If it is USB-only, you can connect both the microphone and the interface to the same computer and choose which one each app uses.

Before you start

Everything here happens locally on your computer and hardware. No online service or account is involved. Gather the following before changing any settings:

• The microphone's manual or spec sheet, so you can confirm which outputs it has (USB only, or USB plus XLR).
• The audio interface's manual, to check its input types, phantom power and whether it has any port described as accepting USB audio input. Most do not.
• An XLR cable if your microphone has an XLR output.
• Any driver or control software the manufacturer lists as required for your operating system. Many devices work without extra drivers, but some need them for full features or low-latency modes.
• The name of the recording, streaming or video call app you plan to use, because input and output device selection is made there as well as in the operating system.

Step-by-step instructions

Option 1: Your microphone has both USB and XLR outputs

• 1. Turn the interface's input gain fully down and switch off monitoring speakers or lower their volume.
• 2. Connect the microphone's XLR output to a microphone input on the interface with an XLR cable.
• 3. Check the microphone manual to see whether its XLR output needs phantom power. Turn phantom power on only if the manual says it is needed.
• 4. Speak at your normal distance and volume while raising the gain until the interface's input level meter shows healthy activity without reaching the clip or red indicator.
• 5. In your operating system or app, select the audio interface as the input device and pick the matching input channel.
• 6. If you also leave the USB cable connected, check the manual to see whether simultaneous USB and XLR use is supported. To keep things simple, select only one of the two paths as the input in your app.

Option 2: Your microphone is USB-only

• 1. Connect the USB microphone directly to the computer, not to the audio interface.
• 2. Keep the audio interface connected to the computer as well if you want to use it for headphones, speakers or other inputs.
• 3. In your operating system's sound settings or in your app's audio settings, set the USB microphone as the input device.
• 4. Set the audio interface, or the microphone's own headphone jack if it has one, as the output device.
• 5. Set both devices to the same sample rate in their settings or control software. A mismatch can cause errors, pitch problems or an app refusing to open the device.
• 6. Adjust the microphone's input level using its own gain control or the operating system's input level setting.

Option 3: Recording from the USB mic and the interface at the same time

Many recording apps open only one audio device at a time, especially with low-latency driver modes on Windows. On macOS, the built-in Audio MIDI Setup utility can create an aggregate device that presents several devices as one. If you use this feature, pick one device as the clock source and enable drift correction for the other. On Windows, check whether your app has a driver mode that allows separate devices for input and output, or a mode that can combine devices. Third-party multi-device drivers exist, but compatibility varies, so treat them as something to test rather than a guaranteed fix. Because two devices each run on their own internal clock, long recordings can slowly drift out of sync. For dependable multi-microphone recording, use XLR microphones connected to one interface.

Check the output

• Watch the input meter in your app while speaking. It should respond to your voice and stay below clipping on loud phrases.
• Make a short test recording, then play it back through the output device you selected. Listen for distortion, a thin or distant sound, hum, or background noise.
• Confirm the project or app sample rate matches the device sample rate. Some apps will play the file but report a sample rate conversion.
• If you combined two devices, record at least a few minutes from both, then check that the tracks still line up at the end. Also listen for clicks or dropouts, which can point to clock drift.
• In video call apps, use the built-in microphone test or a test call where one is available, because the app may use a different device from the one set in the operating system.

Common problems and next steps

The interface does not detect the USB microphone: this is expected for almost all interfaces. Connect the microphone to the computer instead, or use its XLR output if it has one.

No signal through the XLR connection: check that the correct interface input is selected in your app and that gain is turned up. Confirm whether the microphone needs phantom power, and try another XLR cable if the meter still shows nothing.

The app only lets you choose one device: select the USB microphone as the input device and the interface as the output device if the app allows separate choices. If it does not, use an aggregate or combined device as described above, or monitor through the microphone's headphone jack.

Crackles, dropouts or tracks that drift apart: set both devices to the same sample rate. If you are using an aggregate device, make sure drift correction is on. If problems continue, increase the buffer size in your app and reconnect the devices.

Hearing yourself twice or with a delay: turn off monitoring in either the app or the device so that only one monitoring path stays active. Direct monitoring on the microphone or interface usually has the lowest delay.

Recording is too quiet or picks up too much background noise: move closer to the microphone and raise the input level gradually. Check the manual for the correct pickup side and polar pattern. Reduce noise sources in the room before relying on software noise reduction.