In the question below:
How are Adhan and Iqama recited in the Ibadi madhhab?
One of the answers has the statement:
"Note that the adhan and iqamah are most correct if they are performed in natural voice, and for the adahn especially it should be quite -with small pauses- and clear voice (which is also preferred by imam Malik), not in a melodical voice as is usually done in the middle east for example."
As @Crimson points out in the comment section, do we have any point of reference which may explain if one is preferred over the other.
