→ For USB Microphones on Windows: In StudioOne you will set the "Audio Device" setting to your "Windows Audio" then hit "Control Panel" button and set the "Recording" to your Mic in the drop down. Set the latency to the lowest setting as you will be using the Windows Driver for the audio driver.
Set the "Playback" to your computers audio speakers.
This should allow you to configure the USB Mic in StudioOne for use.
→ For USB Microphones on a MAC: Go to Audio Midi Setup, this is found in your Applications/Utilities folder. Set up an Aggregate device and set the input for the aggregate device to the USB Microphone, set the output to the output source you wish to use.
In StudioOne you will set the "Audio Device" setting in Audio Setup options to the Aggregate device you set up in your AudioMidi Setup.