 Hence there are three dispositions (at least) here: a disposition to react in the attack mode, a disposition to react in the decay mode, a disposition to vibrate in a certain way. There are many more. For instance, a disposition to respond by emitting a certain pattern of waves when rubbed or when brushed; or when broken. Many are the dispositions, and the dispositional account should endorse the idea that many are the (possibly unheard) sounds here. Call this the many-disposition problem.