curl --location --request POST '/synthesis_morphing?base_speaker&target_speaker&morph_rate' \
--header 'Content-Type: application/json' \
--data-raw '{
"accent_phrases": [
{
"moras": [
{
"text": "string",
"consonant": "string",
"consonant_length": 0,
"vowel": "string",
"vowel_length": 0,
"pitch": 0
}
],
"accent": 0,
"pause_mora": {
"text": "string",
"consonant": "string",
"consonant_length": 0,
"vowel": "string",
"vowel_length": 0,
"pitch": 0
},
"is_interrogative": false
}
],
"speedScale": 0,
"pitchScale": 0,
"intonationScale": 0,
"volumeScale": 0,
"prePhonemeLength": 0,
"postPhonemeLength": 0,
"pauseLength": 0,
"pauseLengthScale": 1,
"outputSamplingRate": 0,
"outputStereo": true,
"kana": "string"
}'