Brian Green of seeyouinsleep.com has released Accordion Drone Samples, a free sample pack.
These samples were made using a launchpad to send midi into a generative setup which then processed various sounds that were recorded from a toy Emenee accordion.
The sample pack is available as to download from seeyouinsleep.com and can be used free of charge as long as you give due credit for the published use of any of these sounds.