Quadruplet as a noun is one of a group of four babies born from the same mother during the same birth, (i.e. one of four twins). while Quartette as a noun is a music composition in four parts, each performed by a single voice or instrument.
Part of speech: noun
Definition: One of a group of four babies born from the same mother during the same birth, (i.e. one of four twins).
Part of speech: noun
Definition: A music composition in four parts, each performed by a single voice or instrument.
We hope you now know whether to use Quadruplet or Quartette in your sentence.