These techniques are extremely primitive and there are already much superior ways to get information out of the brain. Skilled musicians aren't really that aware of how their fingers or vocal chords etc. are making the notes, they just think the notes and out they come, more like walking and typing. (When you type a letter, do you think about how to move your finger to hit the T key or do you just think "t" and it happens.)

So we already have the ability to just think the music and have a computer read it.