Editing Wolfgang Amadeus Mozart (section)

===Instruments===
Although some of Mozart's early pieces were written for harpsichord, he also became acquainted in his early years with fortepianos made by [[Regensburg]] builder [[Franz Jakob Späth]]. Later when Mozart was visiting Augsburg, he was impressed by [[Johann Andreas Stein|Stein]] fortepianos and shared this in a letter to his father.<ref>{{Cite web|title=The Letters of Wolfgang Amadeus Mozart. (1769–1791), by Wolfgang Amadeus Mozart|url=https://www.gutenberg.org/files/5307/5307-h/5307-h.htm|access-date=5 February 2021|website=www.gutenberg.org|archive-date=26 December 2021|archive-url=https://web.archive.org/web/20211226211001/https://www.gutenberg.org/files/5307/5307-h/5307-h.htm|url-status=live}}</ref> On 22 October 1777, Mozart had premiered [[Piano Concerto No. 7 (Mozart)|his triple-piano concerto]], K. 242, on instruments provided by Stein. The [[Augsburg Cathedral]] organist Demmler was playing the first, Mozart the second and Stein the third part.<ref>{{Cite book|last1=Layer|first1=Adolf|title=Demmler [Demler, Dümmler], Johann Michael|last2=Ullrich|first2=Hermann|date=2001|publisher=Oxford University Press|series=Oxford Music Online|doi=10.1093/gmo/9781561592630.article.07542}}</ref> In 1783, when living in Vienna he purchased an instrument by [[Anton Walter|Walter]].<ref>{{Cite journal|last=Latcham|first=Michael|title=Mozart and the pianos of Gabriel Anton Walter|journal=[[Early Music (journal)|Early Music]]|year=1997|volume=XXV|issue=3|pages=383–400|doi=10.1093/earlyj/XXV.3.383}}</ref> Leopold Mozart confirmed the attachment which Mozart had with his Walter fortepiano: "It is impossible to describe the hustle and bustle. Your brother's pianoforte has been moved at least twelve times from his house to the theatre or to someone else's house."<ref>{{Cite book|last=Bauer|first=Wilhelm|title=Mozart: Briefe und Aufzeichnungen|publisher=|year=1963|isbn=|url=https://www.cengage.com/music/book_content/049557273X_wrightSimms/assets/ITOW/7273X_47_ITOW_Mozart.pdf|pages=|access-date=5 February 2021|archive-date=20 February 2021|archive-url=https://web.archive.org/web/20210220200943/https://www.cengage.com/music/book_content/049557273X_wrightSimms/assets/ITOW/7273X_47_ITOW_Mozart.pdf|url-status=live}}</ref>