A trill, generally three very fast notes on repique/caixa, two or three for surdos Common break specific to Samba Reggae rhythms Samba Reggae 2 and 3 https://youtu.be/frLXzG9-W3Q?t=1197 (variants, especially in the most common samba reggae rhythm; it's a simple circuit that generates a sequence of envelopes or.