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+# Phonemes
+
+## Consonants
+
+|           | labial | alveolar | palatal | velar | glottal |
+|-----------|--------|----------|---------|-------|---------|
+| nasal     | m      | n        | ɲ       | ŋ     |         |
+| plosive   | p b    | t d      | c       | k g   | ʔ       |
+| fricative | f v    | s z      | ç j     | x     | h       |
+| liquid    |        | l r      |         |       |         |
+
+Ravna consists of 22 standard consonants.
+
+- /t/, /d/, and /c/ are aspirated [tʰ], [dʰ], [cʰ] in Ravin dialect, but
+  unaspirated elsewhere
+- /x/ can be realized as [χ] in some dialects
+- /ç/ can be realized as [ʂ] in some rare dialects or by non-native speakers
+- /s/ and /z/ is realized as [ʂ] and [ʐ] in Ravin dialect, but not others
+- Some dialects don't have phoneme /ʔ/
+- In modern Ravna dialect that Ravin people speak, /l/ and /r/ are merged to [ɺ]
+- /r/ can be either approximant [ɹ], tap [ɾ], or trill [r] in other dialects
+
+## Vowels
+
+|        | front | central | back |
+|--------|-------|---------|------|
+| open   | i     | (ɨ)     | u    |
+| mid    | e ɛ   | (ə)     | o    |
+| closed | a     |         | ɔ    |
+
+Ravna consists of 9 vowels.
+
+- /ə/ occurs as unstressed /e/
+- /ɨ/ occurs as unstressed /i/, which disappears when possible
+- /a/ and /o/ have umlauts /ɛ/ and /u/ respectively
+
+## Stress
+
+Ravna is a stress-accent language with clear pitch accent patterns.
+
+If the word has 3 syllables or less:
+
+- The primary stress is on the first syllable.
+- The low pitch is on the first syllable and the high pitch is on the last
+    syllable.  All other syllables have low pitches.
+
+If the word has more than 3 syllables:
+
+- The primary stress is on the first syllable.
+- The secondary stress is on the third syllable.
+- The high pitches are on the stresses, and low pitches are on other syllable.