I made a piece a while ago called the expulsion machine and it had wheels, a trumpet form and complex bits.. I didn’t explore the idea very much and I was looking through some of my older ideas and decided I could do a bit more with that form. Hence this piece.I am delighted I could use an old sewing machine as part of its “engine” and the birds are all drawn to the musicality of the beast.Mind you perhaps like dog whistles it is creating a sound which is inaudible to us..Just a fine piece of fun..