The triangle keeps an ongoing pulse on all the sixteenth notes of the 4/4 time beat, while accentuating the third sixteenth. In this sense, the function can be compared to the rhythm guitar or the hi-hat of the drum set in rock music, although the triangle accentuates the third beat more strongly with its high pitched metallic sound, being damped to give a fainter and drier sound on the other beats. The zabumba, which is played on both sides, on one side giving a grave sound and on the other a sharp whip-like sound, plays the syncopated rhythms essential to forró.