![History of the American pianoforte : its technical development, and the trade . improvements in grand piano actions. Powerand prompt repetition, combined with the least possibleexpenditure of force at the finger-tips, is History of the American pianoforte : its technical development, and the trade . improvements in grand piano actions. Powerand prompt repetition, combined with the least possibleexpenditure of force at the finger-tips, is](https://c8.alamy.com/comp/2AX6X8Y/history-of-the-american-pianoforte-its-technical-development-and-the-trade-improvements-in-grand-piano-actions-powerand-prompt-repetition-combined-with-the-least-possibleexpenditure-of-force-at-the-finger-tips-is-considered-thedesideratum-in-a-piano-action-and-keyboard-and-this-iswhat-piano-manufacturers-have-been-for-years-aiming-atbehr-brothers-co-now-claim-to-have-reached-aheight-of-perfection-never-before-attained-in-touch-andpromptness-in-grand-actions-by-their-new-hammercompensating-lever-the-principal-objection-ordina-rily-to-lightness-of-touch-is-the-weight-of-the-hamme-2AX6X8Y.jpg)
History of the American pianoforte : its technical development, and the trade . improvements in grand piano actions. Powerand prompt repetition, combined with the least possibleexpenditure of force at the finger-tips, is
![Blog: Regulation & Voicing: WHAT BUYERS OF PERFORMANCE-QUALITY PIANOS SHOULD KNOW — Piano Perfect LLC Blog: Regulation & Voicing: WHAT BUYERS OF PERFORMANCE-QUALITY PIANOS SHOULD KNOW — Piano Perfect LLC](https://images.squarespace-cdn.com/content/v1/57deef70ff7c5017de0a9988/1488651025004-KZ0TBDYO6FS91WUGQTRM/image-asset.png)
Blog: Regulation & Voicing: WHAT BUYERS OF PERFORMANCE-QUALITY PIANOS SHOULD KNOW — Piano Perfect LLC
![Sonata for Piano Four-Hands in D Major / D-Dur, K. 381/123A: I. Allegro (Secondo - Metronome: 1/4 = 112 - A' = 443 Hz - With 1. Repetition / mit 1. Wiederholung) by Play It on Amazon Music - Amazon.com Sonata for Piano Four-Hands in D Major / D-Dur, K. 381/123A: I. Allegro (Secondo - Metronome: 1/4 = 112 - A' = 443 Hz - With 1. Repetition / mit 1. Wiederholung) by Play It on Amazon Music - Amazon.com](https://m.media-amazon.com/images/I/71P5FNpnkrL._SS500_.jpg)
Sonata for Piano Four-Hands in D Major / D-Dur, K. 381/123A: I. Allegro (Secondo - Metronome: 1/4 = 112 - A' = 443 Hz - With 1. Repetition / mit 1. Wiederholung) by Play It on Amazon Music - Amazon.com
![7: Typical modern grand piano action mechanism: key (1), whippen (2),... | Download Scientific Diagram 7: Typical modern grand piano action mechanism: key (1), whippen (2),... | Download Scientific Diagram](https://www.researchgate.net/profile/Chandrika-Vyasarayani/publication/266497733/figure/fig1/AS:669464005722133@1536624065614/Typical-modern-grand-piano-action-mechanism-key-1-whippen-2-repetition-lever_Q640.jpg)
7: Typical modern grand piano action mechanism: key (1), whippen (2),... | Download Scientific Diagram
![The acoustics of the piano: Askenfelt & Jansson: From touch to string vibration: Timing in the action The acoustics of the piano: Askenfelt & Jansson: From touch to string vibration: Timing in the action](https://www.speech.kth.se/music/5_lectures/askenflt/images/41_02a.gif)