There are many types of syllables used in music but i presume the kinds you are asking about are "do-re-mi" syllables. These are called solfège and are most commonly associated with choral music and music theory.
8
There are 2 syllables. Choi-ces.
mu-sic
There are 3 syllables in symphony:sym/pho/ny
There are two syllables.
2 syllables
4373598 syllables.
2 syllables
1 syllables
3 syllables
It has two syllables.