Issue.

You have Windows 10 running on the Latitude E7440 and within the Dell Audio management app, MaxxAudio sections are invisible. Sound can sound compressed and sometimes distorted.

It is likely that you have the stock Realtek HD driver V6.1.0.6070 installed which is the latest that Microsoft installs or Dell will provide on support pages.

Solution.

Install Realtek HD driver V6.1.0.6086 and the MaxxAudio sections are then visible. You can disable Maxx Audio and the sound will resort back without enhancements.

The driver is here :
https://www.dell.com/support/home/uk/en/ukbsdt1/drivers/driversdetails?driverid=822r6

Best wishes

BSG