v1.9.1

Highlights

• Added Voice Activity Detection (VAD) support, including WhisperVadFactory, WhisperVadProcessor, builder/options APIs, VAD segment data, functional/unit tests, and a new examples/Vad sample.
• Added Silero VAD model support to WhisperGgmlDownloader, including a dedicated SileroVadType enum and downloader test coverage.
• Added the Whisper.net.Runtime.Cuda12 runtime packages for Windows and Linux, with runtime-loader support and dependency-checker updates.
• Improved language detection by exposing whisper_lang_id() and adding candidate-based DetectLanguageWithProbability support.
• Bumped whisper.cpp through 1.8.5 and refreshed native build/test workflows.
• Simplified sampling strategy configuration by removing IWhisperSamplingStrategyBuilder.
• Improved WhisperProcessor cancellation/instance handling and native failure/error-level propagation.

Compatibility & tooling

• Enabled XML documentation output for build/package artifacts.
• Included symbols in NuGet packages.
• Updated GitHub Actions and runner versions across managed, native, MAUI, NoAVX, CodeQL, package, and push workflows.
• Added repository Copilot instructions and reusable validation skills for managed API, native runtime, runtime-loading, package/release, MAUI, NoAVX, and test-model workflows.
• Updated Blazor reconnection handling and refreshed example package versions.

Dependency updates

• Updated Microsoft.Extensions.AI.Abstractions through 10.2.0.
• Updated Microsoft.Bcl.AsyncInterfaces through 10.0.7.
• Updated Microsoft.AspNetCore.Components.WebAssembly and Server through 10.0.5.
• Updated Microsoft.Extensions.Logging.Debug to 10.0.7.
• Updated NAudio to 2.3.0.
• Updated Microsoft.DotNet.XHarness.TestRunners.Xunit prerelease and coverlet.collector 10.0.0.

What's Changed

• Preparing dev branch for 1.9.1-preview1 to be merged after 1.9.0 release by @sandrohanea in #455
• Fixed blazor example after dotnet 10 changes. by @sandrohanea in #456
• Removed IWhisperSamplingStrategyBuilder and refactored related sampling strategy builders by @sandrohanea in #459
• Bump Microsoft.Extensions.AI.Abstractions from 10.0.0 to 10.0.1 by @dependabot[bot] in #460
• use error levels from ggml library by @yuroller in #463
• fix off by one error language prob array by @yuroller in #465
• Bump Microsoft.Bcl.AsyncInterfaces from 10.0.0 to 10.0.1 by @dependabot[bot] in #467
• Bump Microsoft.Extensions.AI.Abstractions from 10.0.1 to 10.1.1 by @dependabot[bot] in #468
• expose whisper_lang_id() function by @yuroller in #464
• Bump Microsoft.AspNetCore.Components.WebAssembly from 10.0.0 to 10.0.1 by @dependabot[bot] in #469
• Bump Microsoft.AspNetCore.Components.WebAssembly.Server from 10.0.0 to 10.0.1 by @dependabot[bot] in #470
• Added whisper_lang_id to INativeWhisper interface in ProcessingFailureTests. by @sandrohanea in #473
• Restore ios build by @sandrohanea in #472
• Improved DetectLanguageWithProbability to support candidate-based language detection by @sandrohanea in #474
• Update iOS simulator version in GitHub workflows to 26.2 by @sandrohanea in #476
• Adding Whisper.net.Runtime.Cuda12 by @sandrohanea in #475
• Including symbols in nuget package by @sandrohanea in #477
• Bumped whisper.cpp to 1.8.3 by @sandrohanea in #478
• Bump Microsoft.Extensions.AI.Abstractions from 10.1.1 to 10.2.0 by @dependabot[bot] in #482
• Bump Microsoft.AspNetCore.Components.WebAssembly.Server from 10.0.1 to 10.0.2 by @dependabot[bot] in #481
• Bump Microsoft.AspNetCore.Components.WebAssembly from 10.0.1 to 10.0.2 by @dependabot[bot] in #480
• Fixed nuget push + action versions by @sandrohanea in #479
• Bumped nuget versions by @sandrohanea in #483
• Enable XML doc comments for build/package by @Eilon in #491
• Maui actions fix by @fmam0126 in #508
• Bump Microsoft.Extensions.Logging.Debug from 10.0.2 to 10.0.7 by @dependabot[bot] in #506
• Bump Microsoft.Bcl.AsyncInterfaces from 10.0.2 to 10.0.7 by @dependabot[bot] in #503
• Bump NAudio from 2.2.1 to 2.3.0 by @dependabot[bot] in #498
• Bump Microsoft.AspNetCore.Components.WebAssembly from 10.0.2 to 10.0.5 by @dependabot[bot] in #494
• Bump Microsoft.AspNetCore.Components.WebAssembly.Server from 10.0.2 to 10.0.5 by @dependabot[bot] in #495
• Bump Microsoft.DotNet.XHarness.TestRunners.Xunit from 10.0.0-prerelease.25174.1 to 10.0.0-prerelease.26230.1 by @dependabot[bot] in #504
• Bump coverlet.collector from 6.0.4 to 10.0.0 by @dependabot[bot] in #502
• Bump whisper.cpp to 1.8.4 by @fmam0126 in #507
• Bump whisper.cpp to 1.8.5 by @sandrohanea in #510
• feat: Implement Voice Activity Detection (VAD) functionality by @sandrohanea in #511
• feat: Add Copilot instructions by @sandrohanea in #513
• chore: Update action versions in workflow files by @sandrohanea in #512
• refactor: Simplify WhisperProcessor by removing static processor instance tracking and enhancing cancellation handling by @sandrohanea in #514
• Fixed CD push by @sandrohanea in #515
• feat: Add Silero VAD model support and downloader functionality by @sandrohanea in #516

Thanks to the new Contributors

• @yuroller made their first contributions in #463, #465, and #464
• @Eilon made their first contribution in #491
• @fmam0126 made their first contributions in #508 and #507

Full Changelog: 1.9.0...1.9.1