请问句中的its是不是要改为its？

In a Station of the Metro is not a metrical poem, but it does not mean there is no musical beauty. Repeating it, you can feel the beauty of music through it’s repetition of different vowels and consonants, such as /p/ and /au/.

请问句中的its是不是要改为its？

是的。应该改为 its，缘由是：

1. its 是物主代词作定语：“它的”

2. its 是it is的缩写，是句子的主谓部分：“它是”

3. through 是介词，不是连词。后面接的部分应为名词或名词性短语，不是句子。