Random static/crackling/feedback noise trackpad?

hello,

Recently after upgrading to Sierra OS on my 2016 MacBook pro, a static/crackling/feedback noise that seems to be under the trackpad has started. It randomly occurs and will temporarily stop for 2 or 5 minutes after clicking down on the left side of the trackpad.

Not sure if the trackpad is the problem, or possibly coming through the speaker. Playing music sounds good and seems to be noise free. I tried adjusting the volume all the way up and down/mute which does not make any impact to the problem.

Oddly enough, never have had any signs or problems like this when using Captian OS that was pre-installed when I purchased the MacBook. Other then this new problem, the MacBook has been trouble free.

So far, I have re-installed Sierra, reset the NVRAM, disk utility and restarting in safe mode; however, that did not fix the problem. It does not run hot and the fans appear to be correctly working (no odd noises). The drives are SSD. I really don't want to re-format the SSD and re-intall Capitan OS. I have software on my MacBook that I did't back up the installation files and can no longer retrieve. Which means I will have to re-purchase. Also, I didn't use the time machine to back up my system which is my fault for not thinking ahead or being smart. Lesson learned I suppose.

If any has any input suggestions on how to fix this problem please let me know. At this point, I'm trying to determine if this a software or hardware issue. If it's hardware related then I will have to send in for warranty repair. I just want to make sure that there are no other solutions that I can try before send in for repair.

-jeffery

APPLE SSD SM0512G Media

How to reset NVRAM

Follow these steps to reset your Mac computer's NVRAM.

If you have a late-2016 MacBook Pro, the steps are slightly different. Skip to the next section for instructions.

1. Shut down your Mac.
2. Find Command (⌘), Option, P, and R on your keyboard.
3. Turn on your Mac.
4. Press and hold the Command-Option-P-R keys immediately after you hear the startup sound.
5. Hold these keys until the computer restarts and you hear the startup sound for a second time.
6. Release the keys.

Start up in safe mode

To start up in safe mode:

1. Start or restart your Mac, then immediately press and hold the Shift key. The white Apple logo appears on your display. If you don't see the Apple logo, learn what to do.
2. Release the shift key when you see the login window. If your startup disk is encrypted with FileVault, you might be asked to log in twice: once to unlock the startup disk, and again to log in to the Finder.

To leave safe mode, restart your Mac without pressing any keys during startup.