Can USB be used for audio output?
USB audio is a digital audio connection used to send digital music from your computer to a digital to analogue converter (DAC). But why would you use this instead of other outputs? Let us enlighten you. The reason why many people choose USB audio is due to the poor quality built in DAC in a computer.
Does Raspberry Pi have audio output?
Raspberry Pi computers, with the exception of the Zero range, all have audio output on board. The original Raspberry Pi featured a stereo 3.5mm socket, and all A and B models since feature a four-pole socket that also includes composite video.