What is the ruling on using sound effects such as echo, amplification, or repetition in religious clips, as part of a lesson or a piece? Is it permissible to publish clips that include such sound effects if they convey a call to Islam or encourage charity?

Sound effects are permissible if they are distinct from musical instruments. However, if they strongly resemble music, the ruling of prohibition applies to them. In this case, it is not permissible to listen to them or to disseminate materials accompanied by them, even if the materials are beneficial, because there are many legitimate means of da‘wah (call to Islam) that are free from the forbidden.