Bachata — the Dominican guitar ballad turned dance music. The lead voice is the requinto, a small high-strung guitar playing a running eighth-note arpeggio that outlines each chord and bounces off its top note; here it is written at concert pitch for a normal guitar, picked (every event is a "d" pluck). Under it the bongo plays a martillo: steady eighths on the small head (conga-hi stands in) with the large head (conga-lo) opening on the "and" of 2 and the "and" of 4, and the güira (shaker) marks every eighth.
The bass is spare and syncopated: root on 1, fifth pushed on the "and" of 2 and held, root on 4 — the "1 … (2&) … 4" that gives bachata its sway.
Listen for the open bongo tones on the "and" of 2 and 4 pulling against the bass — that is the hip movement of the dance. Practice: play the bass and bongo alone until the pushed fifth and the open tone lock, then add the requinto; keep the arpeggio light and even and let the top notes ring.