If not, then plug the port adapter in too. Many USB audio devices are powered by the USB connection itself. USB hubs can cause complications, and even malfunctions. For best results, hook it direct to a USB port on your Mac.
To get started with your USB audio interface, just plug it into a USB port. Plugging in and finding your new USB audio interface The familar volume menu item lets you select an output device for audio. In between there’s a huge range of options, from USB headphone amps costing many thousands of dollars, and meant for just one pair of headphones, to budget mixers that let musicians record great quality audio at home on modest budgets. At the other end of the list is something like a mixing console, which will have many inputs, allowing your to hook up, say, 16 different inputs and have them all piped into your GarageBand app. These are popular with podcasters, for example. Also, is a driver for the Cmedia USB Sound Devices. Below are the Microsoft generic drivers for 32bit and 64bit versions of Windows.
The simplest USB audio device is a USB microphone, which can be plugged direct into your computer and used to record. Most USB Sound devices will work without any drivers, this is especially true for Windows 8 and 10.