How to express that a musical composition you wrote is your own

I am describing a composition that I wrote for an English project that I have to write a paper on.

Would "self-written composition" be correct? Or "self-composed composition", "personal composition" or "my own composition"?

I'd like to know the commonly used term.

Solution 1:

I think you could say that it is your original composition. It is generally used with reference to a piece of music or art.

An original piece of writing or music was written recently and has not been published or performed before.

http://dictionary.reverso.net/english-cobuild/original%20composition