Editing Old Church Slavonic (section)

===Vowels===
For English equivalents and narrow transcriptions of sounds, see [[wiktionary:AP:pron:cu|Old Church Slavonic Pronunciation on Wiktionary]].
{|
| style="vertical-align: top" |
{| class="wikitable" style="text-align: center"
|+ Oral&nbsp;vowels
! colspan="2" rowspan="2" |
! rowspan="2" |[[Front vowel|Front]]
! colspan="2" |[[Back vowel|Back]]
|-
! [[Unrounded vowel|Unrounded]]
! [[Rounded vowel|Rounded]]
|-
! rowspan="2" |[[Close vowel|Close]]
![[Tenseness|Tense]]
| '''i''' /{{IPA link|i}}/,<br>{{IPA|/ji/}}{{ref|2a|a}}, <br>{{IPA|/jɪ/}}{{ref|2b|b}}, <br>'''ь/ĭ''' /{{IPA link|i}}/{{ref|2c|c}}
| '''y''' /{{IPA link|ɯ}}/{{ref|2d|d}}
| '''u''' /{{IPA link|u}}/
|-
![[Laxness (phonetics)|Lax]]
| '''ь/ĭ''' /{{IPA link|ɪ}}/{{ref|2e|e}}
| '''ъ/ŭ''' /{{IPA link|ʊ}}/{{ref|2e|e}}
|
|-
! rowspan="2" |[[Open vowel|Open]]
![[Laxness (phonetics)|Lax]]
| '''e''' /{{IPA link|ɛ}}/, <br>{{IPA|/jɛ/}}{{ref|2a|a}}
|
| '''o''' /{{IPA link|ɔ}}/
|-
![[Tenseness|Tense]]
| '''ě''' /{{IPA link|æ}}/{{ref|2f|f}}, <br>{{IPA|/jæ/}}{{ref|2a|a}}
| '''a''' /{{IPA link|ɑ}}/{{ref|2g|g}}, <br>/(j)ɑ{{ref|2a|a}}~(j)æ/{{ref|2g|g}}
|
|}
| style="vertical-align: top" |
{| class="wikitable" style="text-align: center"
|+ Nasal&nbsp;vowels
! [[Front vowel|Front]]
! [[Back vowel|Back]]
|-
| '''ę''' /{{IPA link|ɛ̃}}/{{ref|2h|h}}
| '''ǫ''' /{{IPA link|ɔ̃}}/{{ref|2h|h}}<br>/{{IPA link|(j)ɔ̃}}/{{ref|2a|a}}
|}
|}

* Accent is not indicated in writing and must be inferred from later languages and from [[Proto-Slavic accent|reconstructions of Proto-Slavic]].
* {{note|2a|a}} All front vowels were [[Iotation|iotated]] word-initially and succeeding other vowels. The same sometimes applied for *a and *ǫ. In the Bulgarian region, an epenthetic *v was inserted before *ǫ in the place of iotation.
* {{note|2b|b}} The distinction between /i/, /ji/, and /jɪ/ is rarely indicated in writing and must be inferred from reconstructions of Proto-Slavic. In Glagolitic, the three are written as <ⰻ>, <ⰹ>, and <ⰺ> respectively. In Cyrillic, /jɪ/ may sometimes be written as ı, and /ji/ as ї, although this is rarely the case.
* {{note|2c|c}} Yers preceding *j became tense, this was inconsistently reflected in writing in the case of *ь (ex: чаꙗньѥ or чаꙗние, both pronounced [t͡ʃɑjɑn̪ije]), but never with *ъ (which was always written as a yery). 
* {{note|2d|d}} [[Yery]] was the descendant of Proto-Balto-Slavic long *ū and was a [[high back unrounded vowel]]. Tense *ъ merged with *y, which gave rise to yery's spelling as <ъи> (later <ꙑ>, modern <ы>).
* {{note|2e|e}} The [[yer]] vowels [[yer|ь]] and [[yer|ъ]] (ĭ and ŭ) are often called "ultrashort" and were lower, more centralised and shorter than their tense counterparts *i and *y. Both yers had a strong and a weak variant, with a yer always being strong if the next vowel is another yer. Weak yers disappeared in most positions in the word, already sporadically in the earliest texts but more frequently later on. Strong yers, on the other hand, merged with other vowels, particularly ĭ with e and ŭ with o, but differently in different areas. 
* {{note|2f|f}} The pronunciation of [[yat]] ([[yat|ѣ/ě]]) differed by area. In Bulgaria it was a relatively open vowel, commonly reconstructed as {{IPA|/æ/}}, but further north its pronunciation was more closed and it eventually became a diphthong {{IPA|/je/}} (e.g. in modern standard [[Bosnian language|Bosnian]], [[Croatian language|Croatian]], and [[Montenegrin language|Montenegrin]], or modern standard Serbian spoken in [[Bosnia and Herzegovina]], as well as in [[Czech language|Czech]] — the source of the grapheme [[yat|ě]]) or even {{IPA|/i/}} in many areas (e.g. in [[Chakavian]] Croatian, [[Shtokavian]] [[Ikavian]] Croatian, and Bosnian dialects or [[Ukrainian language|Ukrainian]]) or {{IPA|/e/}} (modern standard [[Serbian language|Serbian]] spoken in Serbia).
* {{note|2g|g}} *a was the descendant of Proto-Slavic long *o and was a [[low back unrounded vowel]]. Its iotated variant was often confused with *ě (in Glagolitic they are even the same letter: Ⱑ), so *a was probably fronted to *ě when it followed palatal consonants (this is still the case in Rhodopean dialects).
* {{note|2h|h}} The exact articulation of the nasal vowels is unclear because different areas tend to merge them with different vowels. ę /ɛ̃/ is occasionally seen to merge with e or ě in South Slavic, but becomes ja early on in East Slavic. ǫ /ɔ̃/ generally merges with u or o, but in Bulgaria, ǫ was apparently unrounded and eventually merged with ъ.