The Ruling on the Adhan for the One Praying Alone and the Ruling on Variation and Elongation

Question:
Regarding the adhan, what is its ruling for the one praying alone?

Answer:
There is scholarly disagreement on this. Some scholars consider it obligatory, while others consider it a recommended practice. The most likely view is that it is a strongly recommended practice, and the view that it is obligatory is a strong position. This is because the Prophet (peace and blessings be upon him) said to Malik ibn al-Huwayrith: and they were two people... the same applies to one person. It is also because it is a display of the symbols of prayer, a display of the time, and a notification of it. The view that it is obligatory is a strong position. As for the congregation of two or more, it is a collective obligation.
Q: What if the congregation leaves it out?
A: They would commit a sin. If the congregation leaves it out, they commit a sin.
Q: Does it affect the prayer?
A: No, the prayer is valid. Because it is an obligation outside the prayer. If the adhan and iqamah are left out, they commit a sin, but the prayer is valid.
Q: Which is better, the mu'adhdhins or the imams?
A: The one among them who is most mindful of Allah. [Surah al-Hujurat: 13] The one who is most mindful of Allah is the best among them.
Q: What about one who varies in the adhan, meaning sometimes like the adhan of Abu Mayhura and sometimes like the adhan of Bilal, with the trill?
A: There is nothing wrong with it, there is no blame. But the adhan of Bilal is better, because he was the one who called to prayer in the presence of the Prophet (peace and blessings be upon him). And if he does this one time and that another time, the matter is broad, and praise be to Allah.
Q: What is the ruling on singing in the adhan?
A: Do not prolong it; it should be moderate. Melodizing is disliked; at the very least, it is disliked. It should be moderate, neither too light nor excessively elongated. It should be in between so that people can hear it easily and he can perform it easily. So he should not rush and cause people to miss it, nor should he elongate it, but rather keep it in between.
Q: Does he elongate it to twenty-four movements?
A: No...
Q: This is a question from one of the people. The questioner says: I am a mu'adhdhin and I have children. So I go to the adhan, and after the adhan I return and wake my children from sleep. And I asked the imam of the mosque where I call to prayer, and he answered: It is not permissible?
A: There is nothing wrong. If you call to prayer and then go out to wake them and return, there is nothing wrong and no blame. The imam was wrong. There is nothing wrong. And if it is easy for them to come out with you, that is good. Otherwise, call to prayer and then go back to wake them. And praise be to Allah, there is a gap between the adhan and the iqamah.