---
title: "Changes to Flux Text to Speech (batch)"
method: POST
path: "/v2/speak"
---

# Changes to Flux Text to Speech (batch)

`POST /v2/speak`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 8 of 17 revisions.

- **2026-11-04** `53b6f742b1a1`: 1 info
- **2026-09-17** `72b02abc4a37`: 1 warning, 1 info
- **2026-09-12** `a18297c3e375`: 1 info
- **2026-09-02** `8b1ba180aa1d`: 8 breaking, 2 warning
- **2026-08-15** `76f89c68dacf`: 2 info
- **2026-08-12** `c761ed1f371e`: 4 info
- **2026-08-06** `bd7ba5c18a6b`: 2 info
- **2026-07-26** `2008986d71c7`: 1 info

## Changes

- **2026-11-04** `53b6f742b1a1`: 1 info
  - added the new optional `query` request parameter `normalize_volume`
- **2026-09-17** `72b02abc4a37`: 1 warning, 1 info
  - deleted the `header` request parameter `Authorization`
  - the endpoint scheme security `ApiKeyAuth` was added to the API
- **2026-09-12** `a18297c3e375`: 1 info
  - api operation id `generate` removed and replaced with `audio_generate_2`
- **2026-09-02** `8b1ba180aa1d`: 8 breaking, 2 warning
  - removed the enum value `0.85` from the `query` request parameter `speed`
  - removed the enum value `0.9` from the `query` request parameter `speed`
  - removed the enum value `0.95` from the `query` request parameter `speed`
  - removed the enum value `1` from the `query` request parameter `speed`
  - removed the enum value `1.05` from the `query` request parameter `speed`
  - removed the enum value `1.1` from the `query` request parameter `speed`
  - removed the enum value `1.15` from the `query` request parameter `speed`
  - for the `query` request parameter `speed`, the type changed from `string` to `number`, and format from no format to `double`
  - for the `query` request parameter `speed`, the max was set to `1.50`
  - for the `query` request parameter `speed`, the min was set to `0.50`
- **2026-08-15** `76f89c68dacf`: 2 info
  - api tag `audio` added
  - api tag `speak > v2 > audio` removed
- **2026-08-12** `c761ed1f371e`: 4 info
  - api tag `speak > v2 > audio` added
  - api tag `audio` removed
  - added the new optional `query` request parameter `expressivity`
  - added the new optional `query` request parameter `speed`
- **2026-08-06** `bd7ba5c18a6b`: 2 info
  - api tag `audio` added
  - api tag `speak > v2 > audio` removed
- **2026-07-26** `2008986d71c7`: 1 info
  - endpoint added

---

[Operation](https://skmtc.dev/deepgram/apis/rest-api/docs/v2/speak/post.md) - [API](https://skmtc.dev/deepgram/apis/rest-api.md) - [Page](https://skmtc.dev/deepgram/apis/rest-api/changes/v2/speak/post)