Dell Latitude 7490 +5db Volume Boost
The speaker volume on my Latitude 7490 was never loud enough on hackintosh, so I used AI to create a modified AppleAlc kext that boosts volume by 5db, and can be disabled (brought back to stock just by removing newly added boot-args). Special care was taken to ensure only built in speakers receive volume boost. Even normally loud content should not clip or distort with use of this kext, adjust sound level to your liking.
Note: Make sure you use the following boot-args: alcid=56 alcverbs=1 -alcdhost