I don't stutter, but I have cluttering, which can sound like stuttering to those who don't know much about speech. I interviewed a guy who stutters and who is a speech language pathologist, Evan Sherman, and he talked in depth about your question in the interview: https://youtu.be/pAjqIDYxNPs Basically, if there were an easy answer to stuttering, like changing the deepness of your voice or singing, then stuttering would be cured already. But there isn't, and it's not.