In addition, regulation ensures that your instrument is capable of producing a wide dynamic range - a critical factor, particularly in pianissimo passages. Music is one of the most complex vehicles for expression. Its beauty is reliant upon personal interpretation which employs use of changes in dynamics and tempi. These changes require extremely fine adjustments to respond to the pianists nuances and subtle shadings. A smooth, even response throughout the entire range of the keyboard and an extremely quick action capable of playing rapid passages and repeated notes evenly is essential.
Outstanding response is essential for a pianist to create an outstanding performance.
No amount of practice can compensate for a poorly maintained action. Poor legato touch, chord playing where all notes of the chord don't speak clearly, a gradual loss of subtlety in phrasing and an inability to execute quick passages or note repetitions evenly may be the fault of the piano - not the player. Vertical piano action. Every note in a vertical action has over 25 points of adjustment.