Do all computers output digital thru USB?


Forgive my newbee question but I want to output a digital signal to my USB DAC from my computer. How do I know if my computer outputs digital thru its USB port or analog? How do I get a digital stream to output to my DAC? Thanks for the look and the help. Really.
pugstub
Many newest stuff, requires a previous installation of drivers in order to work properly. Like riffer said, maybe you need to install drivers first.
All USB devices are digital. USB is a digital standard. There is no way to force USB to output an analog signal. Devices such as USB speakers have a digital to analog converter built in.
on your PC you can also pull the digital audio off the PCI or PCIe bus, if you have the right card, and go to AES/EBU.