I just solved the problem by updating my macOS! I hope anyone reading this post have a good day.
Hello all, I just purchased new Dell S2722QC today. All is good except that I can't play any media with the speaker of the S2722QC. I am connecting my MacBook Air M1 and the S2722QC through USB-C. Whenever I play any media, either on YouTube or on my MacBook Air M1, the sound from the speaker cracks and the speed of the media just like x2-3 times faster. But when I connect to my iPad Pro, the speaker works. Is there anyone had the same issues? 
S2722QC, speaker cracks when use with MacBook Air M1