Is it disliked (Makruh) to introduce melodic intonation (Lahn) into the Adhan?

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Introducing melodic intonation (Lahn) into the Adhan is disliked because it may alter the meaning. Specifically, if one pronounces 'Rasul' (Messenger) with a nominative case marker on the lam (nasb), it removes it from functioning as a predicate (khabar). Furthermore, one must not lengthen the word 'Allahu Akbar' to the extent that it creates an extra alif, transforming it into the plural of 'kibr' (drum). The final ha' (in Allah) and the ha' (in Salah) must not be dropped, nor should the ha' in 'Falah' be dropped. This is supported by the report from Abu Hurayrah where the Messenger of Allah (peace be upon him) stated, 'Let no one perform the Adhan for you who omits the ha.' When asked how one should say it, he replied, 'He should say: Ashhadu an la ilaha illa Allah, Ashhadu anna Muhammadan Rasul Allah.' This hadith is reported by Al-Daraqutni in Al-Afrad.