Organografía del bandoneón y prácticas musicales: Lógica dispositiva de los teclados del bandoneón rheinische Tonlage 38/33 y la escritura ideográfica

The bandoneon, a musical instrument created in Germany, is considered the instrument that structures tango as a defined musical genre. This paper focuses on the bandoneon keyboard layout in order to demonstrate the organizational logic behind it. It also considers the musical practices in use when this instrument was adopted in the Rio de la Plata area. From these historical perspectives we can begin to explain why this instrument spread so widely in the area and why it became a key instrument of tango.