2018 Macbook Pro 15`Inch Crackling Speakers

Hi , I know this has been posted already but i wanted to make another post because i feel like Apple needs to address this issue. For awhile i thought it was just me , well i was made too believe it was just me from Apple techs. I recently spent ALOT of money on the new 2018 MacBook Pro. I am DJ/Producer full-time and i use my laptop to prep sets and organise music. I use Rekordbox software and that is it! about 3 weeks ago i noticed while listening to music in itunes that my speakers just randomly started crackling and making a static sound. This doesnt occur all the time but happens normally about after working on the mac for 20-30 minutes. I went into apple to ask questions and i was told that it was either third party app or a dodgy time machine back up. I walked away still confused and decided to believe the guy. A week later and i was still having the same issues after updating all relevant updates/software. I went back into apple and spoke to them and pleaded that i had no clue what was going on. The were very helpful and gave me a new MacBook pro and took my old one. I decided to start this one from scratch without installing a time machine back up and after 2 days it started randomly crackling again so i put my time machine back back on and went into the apple shop again. Between visits i researched to see if ANYBODY else was having this same problem and turns out their are infact many many other people having the same issue. After resetting SMC settings and following online apple support trouble shooting tips that did not work i went back into APPLE and spoke to them and they told me there was nothing i could do until apple addressed the issue. So here i am with a $4000+ MacBook pro , faulty speakers and no clue what to do. I have always been an Apple fan but im starting to really not like them and for a premium product i would expect a premium response to an issue that is effecting me and many other people. if anybody else is having this issue , please let me know and let me know what steps you have taken to rectify this if you have. Im stuck , super lost and super confused on what i am supposed to be doing.