The instruments of a salsa band
4.Scrapers and shakers
These keep a steady, busy texture going under everything else.

Güiro
A hollow gourd with ridges cut into it. A stick scrapes across the ridges: a long scrape on 1, 3, 5 and 7, then two short ones after each.
Shékere
A dried gourd covered in a net of beads. Shaking it makes a bright rattle; here it marks every other beat.