(Redirected from Somatoform disorder). A somatic symptom disorder, formerly known as a somatoform disorder, is a category of mental disorder included in a number of diagnostic schemes of mental illness, including the DSM-5.
Piano uses all 10 fingers, and harp only uses 8. On piano, you have to understand more theory about when to use the black keys than you do on harp, which uses levers or pedals that often donât change through an entire song. Both instruments require you to use two hands to play two sets of notes.
The harp is a unique instrument and many elements of how it is constructed bring light to how to play or write for the instrument. The modern harp has 47 strings and 7 pedals which raise or lower each pitch-class of strings.What that means is that the harp doesn't have any 'black notes' like the piano but rather pedals which sharpen or flatten each string of the same pitch.he harp is not a particularly loud instrument but the sound of its attack does penetrate, so composers often only use one with an orchestra or two with a larger orchestra. The harp relies on 7 foot pedals to change the pitches of its 47 strings.