''A Yai'' can be performed solo or by a man and woman and is often comedic in nature. It is a form of lyrical poetry, often full of double entendres, that can be either scripted or completely impromptu and ad-libbed. When sung by a duo, the man and women take turns, "answering" the other's verse or posing riddles for the other to solve, with short instrumental breaks in between verses. ''Pleng kaah'' (lit. "wedding music") is a set of traditional music and songs played both for entertainment and as accompaniment for the various ceremonial parts of a traditional, days-long Khmer wedding.