---
title: "Changes to 複数まとめて音声合成する"
method: POST
path: "/multi_synthesis"
---

# Changes to 複数まとめて音声合成する

`POST /multi_synthesis`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 21 of 50 revisions.

- **2026-07-17** `1d935a3e31b8`: 1 breaking, 1 info
- **2026-03-31** `bd7182f25e54`: 2 info
- **2025-03-11** `c5651c641b9a`: 1 info
- **2025-03-02** `d8b6a60f88af`: 1 warning, 1 info
- **2025-01-04** `df13668c123d`: 1 info
- **2025-01-03** `b7afc41080b3`: 1 warning
- **2024-10-29** `54501f4624fd`: 5 breaking, 1 warning, 3 info
- **2024-10-05** `e86c0159e1bd`: 2 breaking, 7 warning
- **2024-09-26** `179894d155aa`: 5 breaking, 1 warning, 2 info
- **2024-07-20** `eb97301b5bb3`: 6 breaking, 3 info
- **2024-07-09** `1d0fcadb80c5`: 3 warning, 7 info
- **2024-06-28** `3b94f9a50fd2`: 6 breaking, 1 warning, 3 info
- **2024-05-09** `fd13ee3ebb92`: 1 warning, 1 info
- **2024-05-02** `7d46d11815c2`: 1 warning, 7 info
- **2024-04-26** `907e5011a1aa`: 6 breaking, 1 warning, 1 info
- **2024-03-30** `ac3a4e1af82f`: 1 info
- **2024-03-22** `ef4da11d01e0`: 1 warning, 6 info
- **2024-01-28** `2e8475c446af`: 1 breaking, 1 warning, 1 info
- **2024-01-22** `ba5021ec9a6d`: 3 info
- **2024-01-20** `2a8c9cc0823a`: 1 breaking, 1 warning, 1 info
- **2024-01-17** `1bed97d41915`: 2 breaking, 10 warning, 5 info

## Changes

- **2026-07-17** `1d935a3e31b8`: 1 breaking, 1 info
  - removed the media type `application/json` for the response with the status `422`
  - added the new optional `query` request parameter `enable_interrogative_upspeak`
- **2026-03-31** `bd7182f25e54`: 2 info
  - added the optional property `detail/items/ctx` to the response with the `422` status
  - added the optional property `detail/items/input` to the response with the `422` status
- **2025-03-11** `c5651c641b9a`: 1 info
  - added the new optional request property `items/tempoDynamicsScale`
- **2025-03-02** `d8b6a60f88af`: 1 warning, 1 info
  - removed the request property `items/tempoDynamicsScale`
  - api operation id `multi_synthesis_multi_synthesis_post` removed and replaced with `multi_synthesis`
- **2025-01-04** `df13668c123d`: 1 info
  - added the new optional request property `items/tempoDynamicsScale`
- **2025-01-03** `b7afc41080b3`: 1 warning
  - removed the request property `items/tempoDynamicsScale`
- **2024-10-29** `54501f4624fd`: 5 breaking, 1 warning, 3 info
  - added the new required request property `items/accent_phrases/items/pause_mora/pitch`
  - added the new required request property `items/accent_phrases/items/pause_mora/text`
  - added the new required request property `items/accent_phrases/items/pause_mora/vowel`
  - added the new required request property `items/accent_phrases/items/pause_mora/vowel_length`
  - the `items/accent_phrases/items/pause_mora` request property type changed from no type to `object`
  - removed `#/components/schemas/Mora` from the `items/accent_phrases/items/pause_mora` request property `allOf` list
  - added the new optional request property `items/accent_phrases/items/pause_mora/consonant`
  - added the new optional request property `items/accent_phrases/items/pause_mora/consonant_length`
  - added the new optional request property `items/tempoDynamicsScale`
- **2024-10-05** `e86c0159e1bd`: 2 breaking, 7 warning
  - added `#/components/schemas/Mora` to the `items/accent_phrases/items/pause_mora` request property `allOf` list
  - the `items/accent_phrases/items/pause_mora` request property type changed from `object` to no type
  - removed the request property `items/accent_phrases/items/pause_mora/consonant`
  - removed the request property `items/accent_phrases/items/pause_mora/consonant_length`
  - removed the request property `items/accent_phrases/items/pause_mora/pitch`
  - removed the request property `items/accent_phrases/items/pause_mora/text`
  - removed the request property `items/accent_phrases/items/pause_mora/vowel`
  - removed the request property `items/accent_phrases/items/pause_mora/vowel_length`
  - removed the request property `items/tempoDynamicsScale`
- **2024-09-26** `179894d155aa`: 5 breaking, 1 warning, 2 info
  - added the new required request property `items/accent_phrases/items/pause_mora/pitch`
  - added the new required request property `items/accent_phrases/items/pause_mora/text`
  - added the new required request property `items/accent_phrases/items/pause_mora/vowel`
  - added the new required request property `items/accent_phrases/items/pause_mora/vowel_length`
  - the `items/accent_phrases/items/pause_mora` request property type changed from no type to `object`
  - removed `#/components/schemas/Mora` from the `items/accent_phrases/items/pause_mora` request property `allOf` list
  - added the new optional request property `items/accent_phrases/items/pause_mora/consonant`
  - added the new optional request property `items/accent_phrases/items/pause_mora/consonant_length`
- **2024-07-20** `eb97301b5bb3`: 6 breaking, 3 info
  - `query` request parameter `core_version` list-of-types was narrowed by removing types `null`
  - added `#/components/schemas/Mora` to the `items/accent_phrases/items/pause_mora` request property `allOf` list
  - removed `#/components/schemas/Mora, subschema #2` from the `items/accent_phrases/items/pause_mora` request property `anyOf` list
  - request property `items/accent_phrases/items/moras/items/consonant` list-of-types was narrowed by removing types `null` from media type `application/json`
  - request property `items/accent_phrases/items/moras/items/consonant_length` list-of-types was narrowed by removing types `null` from media type `application/json`
  - request property `items/kana` list-of-types was narrowed by removing types `null` from media type `application/json`
  - added the new optional request property `items/pauseLength`
  - added the new optional request property `items/pauseLengthScale`
  - for the `query` request parameter `core_version`, the type was generalized from no type to `string`
- **2024-07-09** `1d0fcadb80c5`: 3 warning, 7 info
  - removed `#/components/schemas/Mora` from the `items/accent_phrases/items/pause_mora` request property `allOf` list
  - removed the request property `items/pauseLength`
  - removed the request property `items/pauseLengthScale`
  - added the new optional request property `items/tempoDynamicsScale`
  - `query` request parameter `core_version` list-of-types was widened by adding types `null`
  - for the `query` request parameter `core_version`, the type was generalized from `string` to no type
  - added `#/components/schemas/Mora, subschema #2` to the `items/accent_phrases/items/pause_mora` request property `anyOf` list
  - request property `items/accent_phrases/items/moras/items/consonant` list-of-types was widened by adding types `null` to media type `application/json`
  - request property `items/accent_phrases/items/moras/items/consonant_length` list-of-types was widened by adding types `null` to media type `application/json`
  - request property `items/kana` list-of-types was widened by adding types `null` to media type `application/json`
- **2024-06-28** `3b94f9a50fd2`: 6 breaking, 1 warning, 3 info
  - `query` request parameter `core_version` list-of-types was narrowed by removing types `null`
  - added `#/components/schemas/Mora` to the `items/accent_phrases/items/pause_mora` request property `allOf` list
  - removed `#/components/schemas/Mora, subschema #2` from the `items/accent_phrases/items/pause_mora` request property `anyOf` list
  - request property `items/accent_phrases/items/moras/items/consonant` list-of-types was narrowed by removing types `null` from media type `application/json`
  - request property `items/accent_phrases/items/moras/items/consonant_length` list-of-types was narrowed by removing types `null` from media type `application/json`
  - request property `items/kana` list-of-types was narrowed by removing types `null` from media type `application/json`
  - removed the request property `items/tempoDynamicsScale`
  - added the new optional request property `items/pauseLength`
  - added the new optional request property `items/pauseLengthScale`
  - for the `query` request parameter `core_version`, the type was generalized from no type to `string`
- **2024-05-09** `fd13ee3ebb92`: 1 warning, 1 info
  - removed the request property `items/styleStrengthScale`
  - added the new optional request property `items/tempoDynamicsScale`
- **2024-05-02** `7d46d11815c2`: 1 warning, 7 info
  - removed `#/components/schemas/Mora` from the `items/accent_phrases/items/pause_mora` request property `allOf` list
  - added the new optional request property `items/styleStrengthScale`
  - `query` request parameter `core_version` list-of-types was widened by adding types `null`
  - for the `query` request parameter `core_version`, the type was generalized from `string` to no type
  - added `#/components/schemas/Mora, subschema #2` to the `items/accent_phrases/items/pause_mora` request property `anyOf` list
  - request property `items/accent_phrases/items/moras/items/consonant` list-of-types was widened by adding types `null` to media type `application/json`
  - request property `items/accent_phrases/items/moras/items/consonant_length` list-of-types was widened by adding types `null` to media type `application/json`
  - request property `items/kana` list-of-types was widened by adding types `null` to media type `application/json`
- **2024-04-26** `907e5011a1aa`: 6 breaking, 1 warning, 1 info
  - `query` request parameter `core_version` list-of-types was narrowed by removing types `null`
  - added `#/components/schemas/Mora` to the `items/accent_phrases/items/pause_mora` request property `allOf` list
  - removed `#/components/schemas/Mora, subschema #2` from the `items/accent_phrases/items/pause_mora` request property `anyOf` list
  - request property `items/accent_phrases/items/moras/items/consonant` list-of-types was narrowed by removing types `null` from media type `application/json`
  - request property `items/accent_phrases/items/moras/items/consonant_length` list-of-types was narrowed by removing types `null` from media type `application/json`
  - request property `items/kana` list-of-types was narrowed by removing types `null` from media type `application/json`
  - removed the request property `items/styleStrengthScale`
  - for the `query` request parameter `core_version`, the type was generalized from no type to `string`
- **2024-03-30** `ac3a4e1af82f`: 1 info
  - added the new optional request property `items/styleStrengthScale`
- **2024-03-22** `ef4da11d01e0`: 1 warning, 6 info
  - removed `#/components/schemas/Mora` from the `items/accent_phrases/items/pause_mora` request property `allOf` list
  - `query` request parameter `core_version` list-of-types was widened by adding types `null`
  - for the `query` request parameter `core_version`, the type was generalized from `string` to no type
  - added `#/components/schemas/Mora, subschema #2` to the `items/accent_phrases/items/pause_mora` request property `anyOf` list
  - request property `items/accent_phrases/items/moras/items/consonant` list-of-types was widened by adding types `null` to media type `application/json`
  - request property `items/accent_phrases/items/moras/items/consonant_length` list-of-types was widened by adding types `null` to media type `application/json`
  - request property `items/kana` list-of-types was widened by adding types `null` to media type `application/json`
- **2024-01-28** `2e8475c446af`: 1 breaking, 1 warning, 1 info
  - the `query` request parameter `speaker` became required
  - deleted the `query` request parameter `style_id`
  - `query` request parameter `speaker` was reactivated
- **2024-01-22** `ba5021ec9a6d`: 3 info
  - added the new optional `query` request parameter `style_id`
  - the `query` request parameter `speaker` became optional
  - `query` request parameter `speaker` was deprecated
- **2024-01-20** `2a8c9cc0823a`: 1 breaking, 1 warning, 1 info
  - the `query` request parameter `speaker` became required
  - deleted the `query` request parameter `style_id`
  - `query` request parameter `speaker` was reactivated
- **2024-01-17** `1bed97d41915`: 2 breaking, 10 warning, 5 info
  - added `#/components/schemas/Mora` to the `items/accent_phrases/items/pause_mora` request property `allOf` list
  - the `items/accent_phrases/items/pause_mora` request property type changed from `object` to no type
  - deleted the `query` request parameter `enable_interrogative_upspeak`
  - removed the request property `items/accent_phrases/items/pause_mora/consonant`
  - removed the request property `items/accent_phrases/items/pause_mora/consonant_length`
  - removed the request property `items/accent_phrases/items/pause_mora/pitch`
  - removed the request property `items/accent_phrases/items/pause_mora/text`
  - removed the request property `items/accent_phrases/items/pause_mora/vowel`
  - removed the request property `items/accent_phrases/items/pause_mora/vowel_length`
  - removed the request property `items/pauseLength`
  - removed the request property `items/pauseLengthScale`
  - removed the request property `items/tempoDynamicsScale`
  - api operation id `multi_synthesis` removed and replaced with `multi_synthesis_multi_synthesis_post`
  - added the new optional `query` request parameter `style_id`
  - the `query` request parameter `speaker` became optional
  - `query` request parameter `speaker` was deprecated
  - added the media type `application/json` for the response with the status `422`

---

[Operation](https://skmtc.dev/aivis-project/apis/aivisspeech-engine/docs/multi_synthesis/post.md) - [API](https://skmtc.dev/aivis-project/apis/aivisspeech-engine.md) - [Page](https://skmtc.dev/aivis-project/apis/aivisspeech-engine/changes/multi_synthesis/post)