Both links/people are SLPs who specialize in dysfluency AND are stutterers who taught themselves *and many clients* to gain control of their speech, and speak very smoothly and pleasantly. (Some techniques, which come from misunderstanding cause of stutter, teach you to focus on articulators, resulting in a very strange speaking style). [William Parry and understanding how valsalva causes speech blocks](https://m.youtube.com/watch?v=Clmre6U8Rmg) [Tim Mackesey - start with his first podcast episode](https://www.stuttering-specialist.com/stuttering-therapy-atlanta)