Version history

Version 2.0.0-beta14, released 2025-09-08

New features

• Add string value prompt to SynthesisInput

Version 2.0.0-beta13, released 2025-08-28

New features

• Support promptable voices by specifying a model name and a prompt
• Add enum value M4A to enum AudioEncoding

Documentation improvements

• A comment for method StreamingSynthesize in service TextToSpeech is changed
• A comment for enum value AUDIO_ENCODING_UNSPECIFIED in enum AudioEncoding is changed
• A comment for enum value OGG_OPUS in enum AudioEncoding is changed
• A comment for enum value PCM in enum AudioEncoding is changed
• A comment for field low_latency_journey_synthesis in message .google.cloud.texttospeech.v1beta1.AdvancedVoiceOptions is changed
• A comment for enum value PHONETIC_ENCODING_IPA in enum PhoneticEncoding is changed
• A comment for enum value PHONETIC_ENCODING_X_SAMPA in enum PhoneticEncoding is changed
• A comment for field phrase in message .google.cloud.texttospeech.v1beta1.CustomPronunciationParams is changed
• A comment for field pronunciations in message .google.cloud.texttospeech.v1beta1.CustomPronunciations is changed
• A comment for message MultiSpeakerMarkup is changed
• A comment for field custom_pronunciations in message .google.cloud.texttospeech.v1beta1.SynthesisInput is changed
• A comment for field voice_clone in message .google.cloud.texttospeech.v1beta1.VoiceSelectionParams is changed
• A comment for field speaking_rate in message .google.cloud.texttospeech.v1beta1.AudioConfig is changed
• A comment for field audio_encoding in message .google.cloud.texttospeech.v1beta1.StreamingAudioConfig is changed
• A comment for field text in message .google.cloud.texttospeech.v1beta1.StreamingSynthesisInput is changed

Version 2.0.0-beta12, released 2025-01-06

New features

• StreamingSynthesize now supports opus (commit f36434a)

Version 2.0.0-beta11, released 2024-10-29

New features

• Add multi-speaker markup, which allows generating dialogue between multiple speakers (commit 9c3527e)

Version 2.0.0-beta10, released 2024-10-21

New features

• Add brand voice lite (commit 3b4c563)

Version 2.0.0-beta09, released 2024-10-14

New features

• Add low latency journey option to proto (commit dc529a6)
• Add CustomPronunciationParams for upcoming feature work (commit dc529a6)

Version 2.0.0-beta08, released 2024-09-09

New features

• A new method StreamingSynthesize is added to service TextToSpeech (commit 6998d73)

Documentation improvements

• Update Long Audio capabilities to include SSML (commit 6ed33a1)
• A comment for field name in message .google.cloud.texttospeech.v1beta1.VoiceSelectionParams is changed (commit 6998d73)

Version 2.0.0-beta07, released 2024-05-08

New features

• Add IServiceCollection extension methods for client registration where an IServiceProvider is required. (commit 022fab2)

Version 2.0.0-beta06, released 2024-03-26

New features

• Change netstandard2.1 target to netstandard2.0 (commit 82bea85)

Version 2.0.0-beta05, released 2024-02-29

No API surface changes; just dependency updates.

Version 2.0.0-beta04, released 2024-01-08

Bug fixes

• BREAKING CHANGE Correct long audio synthesis HTTP binding (commit 8e47bc8)

Documentation improvements

• Deprecate the custom voice usage field (commit 8e47bc8)
• Update documentation to require certain fields (commit d79e879)

Version 2.0.0-beta03, released 2023-01-16

New features

• Enable REST transport in C# (commit a6c4606)

Documentation improvements

• Fix minor docstring formatting (commit 72b28ed)

Version 2.0.0-beta02, released 2022-12-14

New features

• Add LRS API (commit 96674eb)

Version 2.0.0-beta01, released 2022-06-08

This is the first version of this package to depend on GAX v4.

There are some breaking changes, both in GAX v4 and in the generated code. The changes that aren't specific to any given API are described in the Google Cloud documentation. We don't anticipate any changes to most customer code, but please file a GitHub issue if you run into problems.

The most important change in this release is the use of the Grpc.Net.Client package for gRPC communication, instead of Grpc.Core. When using .NET Core 3.1 or .NET 5.0+ this should lead to a smaller installation footprint and greater compatibility (e.g. with Apple M1 chips). Any significant change in a core component comes with the risk of incompatibility, however - so again, please let us know if you encounter any issues.

Version 1.0.0-beta04, released 2022-01-17

Documentation improvements

• Update comments for ListVoicesRequest (commit d517082)

Version 1.0.0-beta03, released 2021-11-18

• Commit 2260d7c:
  • feat: Add Mulaw and Alaw values to AudioEncoding
  • feat: Generate a resource name for Model

Version 1.0.0-beta02, released 2021-09-06

• Commit ac367e2: feat: Regenerate all APIs to support self-signed JWTs

Version 1.0.0-beta01, released 2021-05-25

Initial release.