I've always felt the opening of the" Uptown Funk" audio file i had was a little muffled and audio quality wasn't great from the various sources i had it on including many top 20 cd compiles. Then recently i came across this one taken from "2016 Grammy Nominees" cd which to my ears sounds good.
Here's just a sample purely for comparison purposes ,let me know how it compares with the one you have:
Dropbox - Mark Ronson - Uptown Funk [full vers] [grammy 2016 ow].wav - (https://www.dropbox.com/s/8bby08c1wxvk1qq/Mark%20Ronson%20-%20Uptown%20Funk%20%5Bfull%20vers%5D%20%5Bgrammy%202016%20ow%5D.wav?dl=0)
Here's just a sample purely for comparison purposes ,let me know how it compares with the one you have:
Dropbox - Mark Ronson - Uptown Funk [full vers] [grammy 2016 ow].wav - (https://www.dropbox.com/s/8bby08c1wxvk1qq/Mark%20Ronson%20-%20Uptown%20Funk%20%5Bfull%20vers%5D%20%5Bgrammy%202016%20ow%5D.wav?dl=0)