Voicebank folder
- character.txt, character.yaml
- readme.txt
- prefix.map
- C3 folder
>> oto.ini
>> ああいあうあえ.wav
>> etc.
- F3 folder
>> oto.ini
>> ああいあうあえ.wav
>> etc.
- A3 folder
>> oto.ini
>> ああいあうあえ.wav
>> etc.
- D4 folder
>> oto.ini
>> ああいあうあえ.wav
>> etc.
Each pitch folder would have its own oto.ini. You differentiate the pitches by applying the suffixes to the alias of the oto entries. Since the audio filenames are the same in each subfolder, you can copy+paste the same base oto to every folder, then find+replace the suffix in each file to match that specific folder, then fine tune all the oto entries.