Today, breathing is on my mind. Especially breathing in time to music. An eight-count inhale, holding it for eight counts, exhale eight counts, and holding for eight.

I believe the term for it is "box breathing" which uses a four count. You need to adjust it to what you are playing or listening to.

I use it for remembering to get enough air while drumming. Keeps me from getting tired.

I also use it as a metronome. Keeps my mind on the tempo.