• Name: Footbass
• Disambiguation: reed instrument, played with the feet
• Wikidata item: Q61282043
• Invented by: Joseph Alexandry, Belgium (pattened in 1894).
• Description: instrument equipped with a bellows on which to two twelve keys are fixed. Pushing the bellows with his/her feet, the player can accomany himself.

It's a wind instrument, that sounds a bit like the basses of an accordion but it's played with the feet, while sitted on a chair. Pressing buttons and the top of the instrument let the air leave the bellows, through the reed (only in one direction).

It is currently still played, at least in Belgium.

Pictures:

• closed
• full of air, from above
• full of air, side-view

Sound extracts:

• https://youtu.be/CZRL8Ftv2J4?t=86 (can be seen in close-up at 1 min 26)
• http://users.skynet.be/sb283847/footbassmerrywiddows[2].mp3
• http://users.skynet.be/sb283847/rag[2].mp3

I wanted to credit this instrument in this release but I couldn't, since it was not listed on Musicbrainz.

There's an article dedicated to it on Wikipedia, but only in Wallonian language as far as I know.

I see it listed as an entity on Wikidata (voetbas). But as a kind of accordion. Which I don't really agree since accordion is not at all played with the foot, but I'm absolutely no expert in instrument classification.

As an additional example, it's part of the title of a book: Het accordeon en de voetbas in België