I talk in my yoga classes.
I don't use music because it distracts me from what I need to say. The goal of my words is to bring you into our body and to get you to pay full attention to the sensations of your body. I try to accomplish that by first, becoming fully aware of your breath and then of your body, usually scanning from feet to head. The goal is to bring awareness to movement and positions of your body during the practice.
Before I started sitting still in meditation, the words of BKS Iyengar resonated with me. He describes using asana, or the performance of the poses, as a "dynamic meditation" when able to do the physical practice with full awareness. Early in my Yoga Journey I was relieved that I didn't have to try quieting my crazy monkey mind in meditation. I could achieve that sense of quietness while paying full attention to how my body felt. I think that was the first step toward getting a handle on my pain. I learned to exercise mindfully and not push my body. I still became strong and more flexible, but I didn't hurt as much. It also taught me a little more patience (still working on that one!). In some ways, my mind and body were not at war anymore with one pushing and the other resisting.