Assertion: tenor's sound | /r/CapableOf | imply perfect intonation
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text: In Mozart singing, the most important element is the instrumental approach of the vocal sound which implies: flawless and slender emission of sound, perfect intonation, legato, diction and phrasing, capability to cope with the dynamic requirements of the score, beauty of timbre, secure line of singing through perfect support and absolute breath control, musical intelligence, body discipline, elegance, nobility, agility and, most importantly, ability for dramatic expressiveness within the narrow borders imposed by the strict Mozartian style.