philbell5

A bit late, but https://www.amazon.co.uk/gp/product/B006NY2IUW/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1 fixed it for me; see attached image.

I tried using cheap closed-back headphones to suppress the ghost notes, but that didn't work. However https://www.amazon.co.uk/gp/product/B006NY2IUW/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1 which are industrial ear defenders with speakers inside so that the wearer can listen to portable music seemed to do the trick well enough. Its possible that a more expensive closed back, around ear, pair of headphones (or active noise cancelling ones) might give enough sound isolation, but it would be a matter of trial and error to find which work and which don't.