| Intro | French harmonium inventor |
| Was |
Musical instrument maker Piano maker |
| From | France |
| Type | Music |
| Gender | male |
| Birth | 6 July 1809, Paris |
| Death |
3 December 1877, Paris (aged 68 years) |
Alexandre-François Debain (6 July 1809 – 3 December 1877) was a French inventor who developed the harmonium. He made a new action system, in which, when depressing a note on the keyboard, a valve opened thereby emitting sound from the instrument. He patented it in Paris in 1842.