Adhan is a call to announce the time of prayer (worship) for Muslims. The melodious call to prayer is echoed by the muezzin from the mosque or other places of worship. The adhan consists of several parts, including the announcement that there is no god but Allah and that Muhammad is the messenger of Allah, as well as the call to prayer. The call to prayer is echoed before the fard (obligatory) prayers, such as the five daily prayers (dawn, midday, asr, maghrib, isya).

The melodious call to prayer is a beautiful and touching call to prayer. Many Muslims consider that the melodious sound of the call to prayer is very important because it can improve the quality of worship.

Some of the factors that can affect the melodious call to prayer include:
- Good singing techniques from the muezzin, such as controlling breath, intonation, and voice techniques.
- Quality sound system in mosques or places of worship.
- Acoustic conditions of the room, such as the shape of the room, wall materials, and others.

There are also several muezzins who study the art of singing or study singing techniques to improve the melodious sound quality of the call to prayer. However, the most important thing is the good intention of the muezzin in reciting the call to prayer, because basically the melodious sound of the call to prayer is something that is subjective and can be different for everyone.