- Oppenheimer (film) (Wikipedia)
Oppenheimer is a 2023 epic biographical thriller drama film written, directed, and produced by Christopher Nolan. It follows the life of J. Robert Oppenheimer, the American theoretical physicist who helped develop the first nuclear weapons during World War II. Based on the 2005 biography American Prometheus by Kai Bird and Martin J. Sherwin, the film chronicles Oppenheimer’s studies, his direction of the Los Alamos Laboratory and his 1954 security hearing. Cillian Murphy stars as Oppenheimer, alongside Robert Downey Jr. as the United States Atomic Energy Commission member Lewis Strauss. The ensemble supporting cast includes Emily Blunt, Matt Damon, Florence Pugh, Josh Hartnett, Casey Affleck, Rami Malek, and Kenneth Branagh.
- In the second half of the 18th century, the piano became the most used keyboard instrument, and composers of the Classical Era such as Joseph Haydn, Wolfgang Amadeus Mozart and Ludwig van Beethoven each wrote several piano concertos, and, to a lesser extent, violin concertos, and concertos for other instruments.
- The invention of the piano is credited to Bartolomeo Cristofori (1655–1731) of Padua, Italy, who was employed by Ferdinando de’ Medici, Grand Prince of Tuscany, as the Keeper of the Instruments.
- [C. P. E.] Bach used for his performances instruments (clavichord and fortepiano) made by Gottfried Silbermann, at that time a well-known builder of keyboard instruments.
- Gottfried Silbermann
- Freiberg also has a notable cathedral containing two famous Gottfried Silbermann organs. There are two other organs made by Gottfried Silbermann in the town – one at the St. Peter’s Church (Petrikirche) and the other one at the St. James’ Church (Jakobikirche).
- Piano (Wikipedia)
The piano is a keyboard instrument that produces sound when pressed on the keys. Most modern pianos have a row of 88 black and white keys: 52 white keys for the notes of the C major scale (C, D, E, F, G, A, and B) and 36 shorter black keys raised above the white keys and set further back, for sharps and flats. This means that the piano can play 88 different pitches (or “notes”), spanning a range of a bit over seven octaves. The black keys are for the “accidentals” (F♯/G♭, G♯/A♭, A♯/B♭, C♯/D♭, and D♯/E♭), which are needed to play in all twelve keys.