I'm referring to the segment from 5:00 to 5:25 of this video:
if you look at the keyboard player, he's clearly blowing into that black wire/pipe, while he's playing the keyboard:
what's the name of that thing he's blowing into?
he's modulating intensity, some tremolo maybe, etc, by blowing into that pipe, right?
is that some digital effect one can use with, say, a guitar?