Is it permissible to add melodic ornamentation to the adhan?

Question:
The questioner says: I am a young man with a good voice, and I am the mu'adhdhin (the one who calls to prayer) of my town. What is the ruling on composing melodies for the adhan (the call to prayer)?

Answer:
It is not permissible to compose melodies; composing melodies turns it into a type of singing. But improving the voice—say improving the voice, and do not say composing melodies—improving the voice is good in the adhan. As for composing melodies, no, do not compose melodies. Yes.