Optipex 9020, Win10, audio channels reversed

I just ran into a problem that I may have had for a long time, but only now noticed.  So I don't know if it is a Dell driver or MS OS problem.

My audio channels are reversed. 

I only noticed this when I had a video that definitely used the LR channel separately.  Then I went into the settings to test the sound, and windows L channel comes out the R speaker, and R channel comes out of the L speaker.  Same with the headphone jack on the front of the computer. Both front headphone jack, and rear line out jacks reflect the same audio channel reversal.

I am running Win10 on my 9020, with the latest Win10 updates, except the 20H2 update.

I reinstalled the Dell Realtek driver, with no result.

Is there a software fix to this, or do I have to do surgery to the headphone jack, and reverse wire the line out?

Thanks