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Köchel-Verzeichnis KV is an abbreviation for Köchel-Verzeichnis, which translates to "Köchel catalogue." It is the commonly accepted listing of Mozart's works, originally developed by Ludwig von Köchel in 1862. Its goal is to list all of Mozart's compositions in chronological order. A complete listing can be found on Wikipedia.

Mozart was a child prodigy. His father - a talented violinist - taught him basic notes on the harpsichord. Mozart composed his first piece of music in 1761, at age five; by age six, he had performed before two imperial courts. In 1763 Mozart and his sister, Maria Anna (”Nannerl”), went on tour.

Köchel catalogue The Köchel catalogue (German: Köchel-Verzeichnis) is a chronological catalogue of compositions by Wolfgang Amadeus Mozart, originally created by Ludwig Ritter von Köchel, in which the entries are abbreviated K. or KV.

The indication "K." or "KV" refers to Köchel Verzeichnis (Köchel catalogue), i.e. the (more or less) chronological (i.e. by composition date) catalogue of Mozart's works by Ludwig von Köchel.

His melodies were simple, graceful, and full of feeling. He employed the orchestra's colors masterfully. The ease with which he composed and the beauty of Mozart's music could be summed up in one phrase - sublime art by a genius. Mozart wrote 22 operas - 10 of them in his teen years.

A particularly significant influence was Johann Christian Bach, whom he visited in London in 1764 and 1765. When he was eight years old, Mozart wrote his first symphony, most of which was probably transcribed by his father.

Kv is in units of RPM/Volt. RPM= Kv * Voltage. Kt - Torque Constant. The more torque a motor needs to produce, the more current it will draw. The Kt rating designates the amount of torque a motor will produce given a current.

A lot of composers' music is listed by opus number (abbreviated Op.), but back in the 19th century, a musicologist named Köchel (Ludwig Alois Ferdinand Ritter von Köchel, to be exact) did the world a huge favor by cataloguing all of Mozart's music. So Mozart's compositions have “K. for Köchel” numbers.

Köchel (K) numbers are assigned sequentially according to the date of composition. For example, Mozart's opera The Magic Flute is given the Köchel number 620, and is (approximately) the 620th piece of music Mozart composed.

The central traits of the classical style are all present in Mozart's music. Clarity, balance, and transparency are the hallmarks of his work, but simplistic notions of its delicacy mask the exceptional power of his finest masterpieces, such as the Piano Concerto No. 24 in C minor, K.

Classical music used formality and emphasis on order and hierarchy, and a "clearer", "cleaner" style that used clearer divisions between parts (notably a clear, single melody accompanied by chords), brighter contrasts and "tone colors" (achieved by the use of dynamic changes and modulations to more keys).

Mozart's sparkling textures, unfailing structural clarity, and above all his unstoppable flow of indelible melody thrillingly combine to produce the very epitome of a “classical” composer.