Ableton live 10 lite
Lenovo think station also Surface
Windows 10 pro
Soundtrack signature12 mtk
Audio drivers
Have previously had intermittent playback problems
Starting four days ago my little fixes failed to restore playback
Starting four days ago I have reinstalled ableton , drivers, windows,
Recertified software and computer with ableton
Spent hours with windows and Harmon customer service
Executed all the windows tweeks on the sweetwater site
Swapped out usb cable tried various usb ports
Now neither machine will produce audio playback.
Can hear audio on the motherboard when using related mme driver
So must be the mixer? How to test usb b connection and function on the mixer?