U3225QE, connect to external speakers via USB?

I use U3225QE as a hub switching between my MacBook and (PC or iPad). My Logitech keyboard, trackpad and mouse are connected to the U3225QE via a USB Logi Bolt receiver plugged in at the back, so my input devices work perfectly with all my devices via KVM. Then, I need audio to be seamlessly switched among different devices as well. Now, the only problem I have with U3225QE is audio output from U3225QE, which seems only available from the Audio line-out port. So, I want to ask if there is any way to have audio output from one of U3225QE's usb port to my external speaker, which can accept USB-C audio input? I think it's a pretty easy functionality for one of the best monitors in the world. 

My speaker doesn't have 3.5mm input port and bluetooth connection is not acceptable, because video and audio cannot completely sync under bluetooth connection. U3225QE itself has no internal speaker, so I have to use a external speaker.