Music has a way of freeing emotions with its rhythms, vibrations, and beats.
Dim the lights right down, put on a piece of music that you know moves you in a particular way.
Just listen for a while and then when you feel ready, without looking down, let your response to the music move down your hand and into the pen through to the blankness of the paper.
Hold the pen loosely and let it move as around as it wants to. Move with the pace, tempo and style of the music and don't be tempted to make your scribble 'into' anything.
Take on the idea that you're a witness of what your hand is doing rather than its controller.
Open to the idea of not drawing to music, rather drawing the music itself. It doesn't matter what the end result is on your paper, don't think about it in fact don't look down.
Not trying to make any forms or shape, just responding and following the pace, tempo and pitch.
Music is a moral law. It gives soul to the universe, wings to the mind, flight to the imagination, and charm and gaiety to life and to everything.
Plato