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Somethings that I knew about music and otthers that I psychograph, my piano that I won in my 4 years old birthday I opened my father didn't fix for me was inside a xylophone, I psychograph that the pianos that wasn't the one with tale are inside bells, of different sizes to have all the keys, you know the tale piano is stretch ropes, and the most famous organs are pipes and went inside them air and when the note is hit it is open his pipe to went air, why doesn't sound like a pipe? See the diffrence of size? The tale piano a ropes why doesn't sound like a guitar see the material and the size, are mute ropes that's only make sound with the perfect hit by the small hamer inside on it. Neither this is that I psychograph that the pedal is to suspend the square of ropes that are inside the piano in my mind probably the sound came more grave, making the piano could play a composition for organ the organ has more notes, but I saw in the youtube that the pedal is to sustain the sound of the note, but wait many pianos has 4 pedals, say what is the use for my theory or for the other, for pedals to sustain the note or for pedal make 352 keys, but one pedal is the enought to hold the sound. Rute Bezerra de Menezes Gondim