Synthesize multiple speeches at once
curl --request POST \
--url https://api.example.com/multi_synthesis \
--header 'Content-Type: application/json' \
--data '
[
{
"accent_phrases": [
{
"moras": [
{
"text": "<string>",
"vowel": "<string>",
"vowel_length": 123,
"pitch": 123,
"consonant": "<string>",
"consonant_length": 123
}
],
"accent": 123,
"is_interrogative": false
}
],
"speedScale": 123,
"pitchScale": 123,
"intonationScale": 123,
"volumeScale": 123,
"prePhonemeLength": 123,
"postPhonemeLength": 123,
"outputSamplingRate": 123,
"outputStereo": true,
"pauseLength": 123,
"pauseLengthScale": 1,
"kana": "<string>"
}
]
'import requests
url = "https://api.example.com/multi_synthesis"
payload = [
{
"accent_phrases": [
{
"moras": [
{
"text": "<string>",
"vowel": "<string>",
"vowel_length": 123,
"pitch": 123,
"consonant": "<string>",
"consonant_length": 123
}
],
"accent": 123,
"is_interrogative": False
}
],
"speedScale": 123,
"pitchScale": 123,
"intonationScale": 123,
"volumeScale": 123,
"prePhonemeLength": 123,
"postPhonemeLength": 123,
"outputSamplingRate": 123,
"outputStereo": True,
"pauseLength": 123,
"pauseLengthScale": 1,
"kana": "<string>"
}
]
headers = {"Content-Type": "application/json"}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify([
{
accent_phrases: [
{
moras: [
{
text: '<string>',
vowel: '<string>',
vowel_length: 123,
pitch: 123,
consonant: '<string>',
consonant_length: 123
}
],
accent: 123,
is_interrogative: false
}
],
speedScale: 123,
pitchScale: 123,
intonationScale: 123,
volumeScale: 123,
prePhonemeLength: 123,
postPhonemeLength: 123,
outputSamplingRate: 123,
outputStereo: true,
pauseLength: 123,
pauseLengthScale: 1,
kana: '<string>'
}
])
};
fetch('https://api.example.com/multi_synthesis', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.example.com/multi_synthesis",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
[
'accent_phrases' => [
[
'moras' => [
[
'text' => '<string>',
'vowel' => '<string>',
'vowel_length' => 123,
'pitch' => 123,
'consonant' => '<string>',
'consonant_length' => 123
]
],
'accent' => 123,
'is_interrogative' => false
]
],
'speedScale' => 123,
'pitchScale' => 123,
'intonationScale' => 123,
'volumeScale' => 123,
'prePhonemeLength' => 123,
'postPhonemeLength' => 123,
'outputSamplingRate' => 123,
'outputStereo' => true,
'pauseLength' => 123,
'pauseLengthScale' => 1,
'kana' => '<string>'
]
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.example.com/multi_synthesis"
payload := strings.NewReader("[\n {\n \"accent_phrases\": [\n {\n \"moras\": [\n {\n \"text\": \"<string>\",\n \"vowel\": \"<string>\",\n \"vowel_length\": 123,\n \"pitch\": 123,\n \"consonant\": \"<string>\",\n \"consonant_length\": 123\n }\n ],\n \"accent\": 123,\n \"is_interrogative\": false\n }\n ],\n \"speedScale\": 123,\n \"pitchScale\": 123,\n \"intonationScale\": 123,\n \"volumeScale\": 123,\n \"prePhonemeLength\": 123,\n \"postPhonemeLength\": 123,\n \"outputSamplingRate\": 123,\n \"outputStereo\": true,\n \"pauseLength\": 123,\n \"pauseLengthScale\": 1,\n \"kana\": \"<string>\"\n }\n]")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://api.example.com/multi_synthesis")
.header("Content-Type", "application/json")
.body("[\n {\n \"accent_phrases\": [\n {\n \"moras\": [\n {\n \"text\": \"<string>\",\n \"vowel\": \"<string>\",\n \"vowel_length\": 123,\n \"pitch\": 123,\n \"consonant\": \"<string>\",\n \"consonant_length\": 123\n }\n ],\n \"accent\": 123,\n \"is_interrogative\": false\n }\n ],\n \"speedScale\": 123,\n \"pitchScale\": 123,\n \"intonationScale\": 123,\n \"volumeScale\": 123,\n \"prePhonemeLength\": 123,\n \"postPhonemeLength\": 123,\n \"outputSamplingRate\": 123,\n \"outputStereo\": true,\n \"pauseLength\": 123,\n \"pauseLengthScale\": 1,\n \"kana\": \"<string>\"\n }\n]")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.example.com/multi_synthesis")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "[\n {\n \"accent_phrases\": [\n {\n \"moras\": [\n {\n \"text\": \"<string>\",\n \"vowel\": \"<string>\",\n \"vowel_length\": 123,\n \"pitch\": 123,\n \"consonant\": \"<string>\",\n \"consonant_length\": 123\n }\n ],\n \"accent\": 123,\n \"is_interrogative\": false\n }\n ],\n \"speedScale\": 123,\n \"pitchScale\": 123,\n \"intonationScale\": 123,\n \"volumeScale\": 123,\n \"prePhonemeLength\": 123,\n \"postPhonemeLength\": 123,\n \"outputSamplingRate\": 123,\n \"outputStereo\": true,\n \"pauseLength\": 123,\n \"pauseLengthScale\": 1,\n \"kana\": \"<string>\"\n }\n]"
response = http.request(request)
puts response.read_body"<string>"{
"detail": [
{
"loc": [
"<string>"
],
"msg": "<string>",
"type": "<string>",
"input": "<unknown>",
"ctx": {}
}
]
}Synthesize multiple speeches at once
Laravel Implementation Status: ✅ Fully supported by Core (fallback implemented)
POST
/
multi_synthesis
Synthesize multiple speeches at once
curl --request POST \
--url https://api.example.com/multi_synthesis \
--header 'Content-Type: application/json' \
--data '
[
{
"accent_phrases": [
{
"moras": [
{
"text": "<string>",
"vowel": "<string>",
"vowel_length": 123,
"pitch": 123,
"consonant": "<string>",
"consonant_length": 123
}
],
"accent": 123,
"is_interrogative": false
}
],
"speedScale": 123,
"pitchScale": 123,
"intonationScale": 123,
"volumeScale": 123,
"prePhonemeLength": 123,
"postPhonemeLength": 123,
"outputSamplingRate": 123,
"outputStereo": true,
"pauseLength": 123,
"pauseLengthScale": 1,
"kana": "<string>"
}
]
'import requests
url = "https://api.example.com/multi_synthesis"
payload = [
{
"accent_phrases": [
{
"moras": [
{
"text": "<string>",
"vowel": "<string>",
"vowel_length": 123,
"pitch": 123,
"consonant": "<string>",
"consonant_length": 123
}
],
"accent": 123,
"is_interrogative": False
}
],
"speedScale": 123,
"pitchScale": 123,
"intonationScale": 123,
"volumeScale": 123,
"prePhonemeLength": 123,
"postPhonemeLength": 123,
"outputSamplingRate": 123,
"outputStereo": True,
"pauseLength": 123,
"pauseLengthScale": 1,
"kana": "<string>"
}
]
headers = {"Content-Type": "application/json"}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify([
{
accent_phrases: [
{
moras: [
{
text: '<string>',
vowel: '<string>',
vowel_length: 123,
pitch: 123,
consonant: '<string>',
consonant_length: 123
}
],
accent: 123,
is_interrogative: false
}
],
speedScale: 123,
pitchScale: 123,
intonationScale: 123,
volumeScale: 123,
prePhonemeLength: 123,
postPhonemeLength: 123,
outputSamplingRate: 123,
outputStereo: true,
pauseLength: 123,
pauseLengthScale: 1,
kana: '<string>'
}
])
};
fetch('https://api.example.com/multi_synthesis', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.example.com/multi_synthesis",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
[
'accent_phrases' => [
[
'moras' => [
[
'text' => '<string>',
'vowel' => '<string>',
'vowel_length' => 123,
'pitch' => 123,
'consonant' => '<string>',
'consonant_length' => 123
]
],
'accent' => 123,
'is_interrogative' => false
]
],
'speedScale' => 123,
'pitchScale' => 123,
'intonationScale' => 123,
'volumeScale' => 123,
'prePhonemeLength' => 123,
'postPhonemeLength' => 123,
'outputSamplingRate' => 123,
'outputStereo' => true,
'pauseLength' => 123,
'pauseLengthScale' => 1,
'kana' => '<string>'
]
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.example.com/multi_synthesis"
payload := strings.NewReader("[\n {\n \"accent_phrases\": [\n {\n \"moras\": [\n {\n \"text\": \"<string>\",\n \"vowel\": \"<string>\",\n \"vowel_length\": 123,\n \"pitch\": 123,\n \"consonant\": \"<string>\",\n \"consonant_length\": 123\n }\n ],\n \"accent\": 123,\n \"is_interrogative\": false\n }\n ],\n \"speedScale\": 123,\n \"pitchScale\": 123,\n \"intonationScale\": 123,\n \"volumeScale\": 123,\n \"prePhonemeLength\": 123,\n \"postPhonemeLength\": 123,\n \"outputSamplingRate\": 123,\n \"outputStereo\": true,\n \"pauseLength\": 123,\n \"pauseLengthScale\": 1,\n \"kana\": \"<string>\"\n }\n]")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://api.example.com/multi_synthesis")
.header("Content-Type", "application/json")
.body("[\n {\n \"accent_phrases\": [\n {\n \"moras\": [\n {\n \"text\": \"<string>\",\n \"vowel\": \"<string>\",\n \"vowel_length\": 123,\n \"pitch\": 123,\n \"consonant\": \"<string>\",\n \"consonant_length\": 123\n }\n ],\n \"accent\": 123,\n \"is_interrogative\": false\n }\n ],\n \"speedScale\": 123,\n \"pitchScale\": 123,\n \"intonationScale\": 123,\n \"volumeScale\": 123,\n \"prePhonemeLength\": 123,\n \"postPhonemeLength\": 123,\n \"outputSamplingRate\": 123,\n \"outputStereo\": true,\n \"pauseLength\": 123,\n \"pauseLengthScale\": 1,\n \"kana\": \"<string>\"\n }\n]")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.example.com/multi_synthesis")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "[\n {\n \"accent_phrases\": [\n {\n \"moras\": [\n {\n \"text\": \"<string>\",\n \"vowel\": \"<string>\",\n \"vowel_length\": 123,\n \"pitch\": 123,\n \"consonant\": \"<string>\",\n \"consonant_length\": 123\n }\n ],\n \"accent\": 123,\n \"is_interrogative\": false\n }\n ],\n \"speedScale\": 123,\n \"pitchScale\": 123,\n \"intonationScale\": 123,\n \"volumeScale\": 123,\n \"prePhonemeLength\": 123,\n \"postPhonemeLength\": 123,\n \"outputSamplingRate\": 123,\n \"outputStereo\": true,\n \"pauseLength\": 123,\n \"pauseLengthScale\": 1,\n \"kana\": \"<string>\"\n }\n]"
response = http.request(request)
puts response.read_body"<string>"{
"detail": [
{
"loc": [
"<string>"
],
"msg": "<string>",
"type": "<string>",
"input": "<unknown>",
"ctx": {}
}
]
}Query Parameters
Automatically adjust sentence-final intonation when the text is interrogative
Body
application/json
List of accent phrases
Show child attributes
Show child attributes
Overall speech speed
Overall pitch
Overall intonation
Overall volume
Silence duration before the audio
Silence duration after the audio
Output sampling rate of the audio data
Whether to output audio data in stereo
Silence duration for punctuation etc. Ignored when null. Default value is null.
Silence duration for punctuation etc. (multiplier). Default value is 1.
[Read-only] Text in AquesTalk-style notation. Ignored as a query for speech synthesis.
Response
Successful Response
The response is of type file.
Last modified on July 13, 2026
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