I used audacity to synthesize the five-tone chime made by the montreal metro's jeumont train element 41. Backstory: the train itself was an mr-63 type train modified by canron circa 1971, adding a current chopper to the train's started system. The chopper produced an 'idle' tone at around 45 hz, and as the train departed, five tones at frequencies of 90, 120, 180, 240, and 360 hz. Originally there were 3 'elements' (a set of 2 motor cars and 1 trailer car) with the jeumont-schneider current chopper (element 40, made up of cars 81-579, 80-040, and 81-580; element 41, made up of cars 81-581, 80-041, and 81-582; and element 42, made up of cars 81-583, 80-042, and 81-584). During the early 2000s refurbishments, element 40 was retired from service to provide spare parts for the other elements, which were then connected with elements of 'normal' mr-63 trains. Only the 81-579 car remains from element 40. Element 41 and element 42 were then retired in 2018 when the other mr-63 trains were retired.
著者: Chungusa
