What do you need a keyboard for, to mark where is kick and where is snare while playing with knobs, or to write a transcription of somebody's talk while playing

What do you need a keyboard for, to mark where is kick and where is snare while playing with knobs, or to write a transcription of somebody's talk while playing with knobs? I use to write comments on HN using a 10-button kbd sometimes so if you do not need to write a long lines this approach is the most comfortable way of typing while driving when you have only one free hand and almost no free attention. Chord keyboard looks like too alien and as a Dvorak touchtyper I do not think anything might be faster for me if considering time-to-learn. I have been switching for 10 years from QWERTY to Dvorak until I have got an ability to input all of my passwords w/o looking so I do not believe that learning a chord kbd is an easy way. Actually I used to solve a similar problem with mouse/kbd switching and my solution is to stick to keyboard and touchtype-friendly interfaces, such as Vim.