The local factory had been creating accordions with symmetrical keyboards, which was a first step towards the creation of the Harmoneon.

[5] The Stradella bass system had long been controversial in the accordion world, as it was dissatisfactory to many accordionists.

Segalla was the brother-in-law of Bortolo Busato, an Italian luthier specialising in guitars who later created many Harmoneons.

[6] Later on, harmoneons were added to the catalogues of accordion producers such as Bonifassi,[10] Atelier,[11] Cavagnolo, and Maugein.

[citation needed] Numerous French composers wrote for the Harmoneon, particularly Alain Abbot.