Here’s an interesting augmentation of the double bass: an attached kalimba (aka “thumb piano”). Olivier Babaz gives us his rendition of Paul Desmond’s “Take Five” while also playing a shaker with his foot, one-man-band style.
Augmenting the instrument in this way obviously opens up tons of interesting possibilities for acoustic performance in the same way that pickups opens up opportunities for electronic performance.
Not sure I’d permanently mount a kalimba on my bass, but this is pretty interesting!