I'm working toward an MFA in Interdisciplinary Arts, within which my focus is a contemplative approach to art. My personal practice focuses on music, (which includes experimentation with sound. I have been ruminating about how I might extend my research into a PhD and became inspired at your post. I imagine you've heard of Pauline Oliveros, (who just passed on in November)? She has a book on her work 'Deep Listening'. She was a practitioner of meditation and karate.
Let me know if you have any hints for someone aspiring toward this ilk of PhD work. My running question at the moment is if I might be able to keep the bulk of my work practice-based within a PhD, (I am much more of an engaged artist than an academic). Also, what University you are working with...