Original sentence: In long vowels and diphthongs the accent could fall on either half (or mora) of the syllable, if it fell on the first mora, so that the syllable had a high tone follwed by a low tone, it is indicated in polytonic orthgraphy by the circumflex.Originally, all the following sounds are thought to have been plosives in classical Ancient Greek.Unlike Modern Greek, this was a pitch accent; in other words the accented syllable was pronounced at a higher pitch than the other syllables; Dionysius of Halicarnassus states that the interval was approximately that of a fifth in music
Edited sentence: According to the 19th century reconstructed pronunciation all the following sounds are thought to have been plosives in classical Ancient Greek.In long vowels and diphthongs the accent could fall on either half (or mora) of the syllable, if  it fell on the first mora, so that the syllable had a high tone follwed by a low tone, it is indicated in polytonic orthgraphy by the circumflex.Opponents of the arguments used to justify the orginal 19th century form of the reconstructed pronunciation argue that evidence that was not available to the theories proponents at the time the theory was devised shows that the aphona were pronounced in the same way as they are in modern Greek since very early times including during the archaic period.Other more modern interpretations indicate that the accent in ancient Greek was a stress accent like most other indo-European languages.The group of the mediae is defined by the Hellenistic grammarian Dionysios Thrax as being the group of sounds in-between those of the psila and the dasea.This defintion only makes sence if the mediae were fricatives like they are in Modern Greek long before Dionysios Thrax wrote his account.Unlike Modern Greek, this is interpreted as a pitch accent according to 19th century reconstructed pronunciation; in other words the accented syllable was pronounced at a higher pitch than the other syllables