A musette is a nine-line 24-syllable rhyming poem. There are three stanzas with three lines. The first and third lines of each stanza are two syllables each. They only rhyme with each other. The second line of each stanza is four syllables. This line doesn’t rhyme at all.
The rhyming pattern of a musette is as follows:
a – b – a … c – d – c … e – f – e