Twi vowelsThese are giving me a headache. First up, there are these things called Advanced Tongue Root (+ATR) and Retracted Tongue Root (−ATR). I still don't know why a distinction is made, but here they are (note the difference in their order from English vowels).
| +ATR | −ATR |
i | /i/ | — |
e | /e/ | /ɪ~e/ |
ɛ | — | /ɛ/ |
a | /æ~ɑ/ | /ɑ/ |
ɔ | — | /ɔ/ |
o | /o/ | /ʊ~o/ |
u | /u/ | — |
In addition, Twi vowels are contrasted by length, nasalization and tones. There are three tones: high, mid, and low. Tones can play an important role in distinguishing homographs, e.g.
papa means "good" when pronounced with two high tones, "a palm-leaf fan" when pronounced with two low tones, and "father" when pronounced with a low tone followed by a high tone. And what exactly do these tones sound like? Well, I'd like to be able to say something like "the high tone is similar to the first tone in Mandarin", but, unfortunately, I can't. The tone system in Twi is complicated by a phenomenon called tone terracing. Basically it's a set of rules governing the absolute pitch of tones in normal speech – so, for example, if a low tone comes between two high tones, the second high tone is pronounced with a mid tone.
I still have a long, long way to go …