Audio muted on Lenovo Ideacentre 5 14IAB7

The audio does work on a newer Dell with an I3 processor instead of an I7.  That machine, however, uses TRSS connections for its onboard audio so that headphones that work on one machine can't work on another.  The audio even works form the speakers in the monitor.

I have a Soundblaster Rx installed on the Lenovo.  I can't get the audio to operate at volume after re-installing the soundcard drivers and after trying to Reset Windows from the control panel.  This computer uses an LG Ultragear+ for the monitor.

I was watching Tender Mercies on Amazon Prime.