Boîte à bourdons (f)
(with) definite article: la"drone box", compound (with some options): no bell, no cavity / reed types? [yet unknown]
An internal set of 3-6 drones ("Bourdons de poche", inside the bag), each of which can be switched on/off by a device on the surface of the bag. They can be activated as single drones or combined, to produce a chord; This unique and interesting addition is an invention of Alain «Kachtoun» Cadeillan (no details known [yet]).