![Music, Piano keyboard, Octave, Pitch class, Major diatonic scale, Major chord, Chromatic scale, Tempered scale, Staff, Clef. Music, Piano keyboard, Octave, Pitch class, Major diatonic scale, Major chord, Chromatic scale, Tempered scale, Staff, Clef.](https://solitaryroad.com/c1060/ole1.gif)
Music, Piano keyboard, Octave, Pitch class, Major diatonic scale, Major chord, Chromatic scale, Tempered scale, Staff, Clef.
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construction - Why do many acoustic pianos have a wooden block to the left of the keys? - Music: Practice & Theory Stack Exchange
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