I have written about voicing here before. I find it to be one of the most neglected topics in woodwind teaching, and when it is taught, is is often taught without a lot of clarity. This is a shame because voicing is crucial to good tone production, affecting response, tone, and intonation.
Here is a handout from a recent workshop. I don’t think there is much here that I haven’t covered on the blog already, but it’s a good overview in a tidy package.