Here is what i am hearing, your voice is struggeling because there is to big diffrence between your open and closed sounds. More importantly the narrower vowels, and that entire line is just a pingpongmatch between open and closed vowels. Buuuhht Laaahhiiiihhfs nAaat a Wheeeeel wiihth Chaaahhnge mAaaaiihhhd Ohhhf Steeeeeeeeel try this, a simple "trick" i personaly use When singers and songwriters tends to gimme the short stick and throw in to many consonants