Why is the sound of a harp soft in comparison with the sound of a piano?
Step 1 of 3 The piano get its sound ,when we hit the keys of the piano they move a hammer which then strikes a short string which vibrates to make the musical sound. Sound on the harp is produced by plucking the strings. The finger plucks the string, setting it into vibration. This wave of vibration travels down the string to the wooden soundboard where it is amplified.