Modern .NET SDK for Soniox generated from the provider's OpenAPI definition with AutoSDK.
Built from Soniox's docs OpenAPI definition so the SDK stays close to the upstream API surface.
Designed for fast regeneration and low-friction updates when the upstream API changes without breaking compatibility.
Targets current .NET practices including nullability, trimming, NativeAOT awareness, and source-generated serialization.
usingSoniox;usingvarclient=newSonioxClient(apiKey);varupdate=SonioxClient.ParseServerFrame(""" { "tokens": [ { "text": "привет", "start_ms": 10, "end_ms": 320, "confidence": 0.97, "speaker": "speaker_0", "language": "ru", "is_final": true } ], "final_audio_proc_ms": 320, "total_audio_proc_ms": 400, "finished": false } """,responseId:"response",outvarfinished);vartokens=update.AdditionalProperties![SonioxSpeechToTextPropertyNames.Tokens].Which;update.AdditionalProperties[SonioxSpeechToTextPropertyNames.Speakers]Basic example showing how to create an authenticated Soniox client. The
SONIOX_API_KEY environment variable holds the API key issued by the
Soniox Console.
usingvarclient=newSonioxClient(apiKey);Fetches the list of Soniox speech-to-text models available to your workspace, including supported languages and transcription mode (async / real-time).
usingvarclient=newSonioxClient(apiKey);varresponse=awaitclient.Models.GetModelsAsync();foreach(varmodelinresponse.Models){}Submits a Soniox async transcription job for a public audio URL and polls until it completes. Uses the current default async model.
usingvarclient=newSonioxClient(apiKey);varcreated=awaitclient.Transcriptions.CreateTranscriptionAsync(model:SonioxClient.DefaultAsyncModel,audioUrl:"https://soniox.com/media/examples/coffee_shop.mp3");// Poll until the job reaches a terminal state.while(created.StatusisTranscriptionStatus.Queued or TranscriptionStatus.Processing){awaitTask.Delay(1000);created=awaitclient.Transcriptions.GetTranscriptionAsync(created.Id);}vartranscript=awaitclient.Transcriptions.GetTranscriptionTranscriptAsync(created.Id);// Clean up to keep the workspace tidy.awaitclient.Transcriptions.DeleteTranscriptionAsync(created.Id);Creates a Soniox voice clone from a short reference clip, waits until it is ready for the current TTS model, then uses the cloned voice ID in a REST Text-to-Speech request.
SonioxClient.DefaultTtsModel targets Soniox TTS v2 (tts-rt-v2) for both
REST and realtime generation. Use SonioxClient.TtsRealtimeV1ModelId only
when you explicitly need the backward-compatible v1 model.
Set SONIOX_VOICE_CLONE_AUDIO_PATH to a clear speech sample you have the
rights and consent to clone. Soniox accepts reference clips up to 20 seconds.
Set SONIOX_RUN_VOICE_CLONING_EXAMPLE=1 before running this paid example.
if(!IsEnvironmentFlagEnabled(RunVoiceCloningExampleFlag)&&!IsEnvironmentFlagEnabled(RunPaidTestsFlag)){thrownewAssertInconclusiveException($"Set {RunVoiceCloningExampleFlag}=1 to run this paid voice-cloning example.");}varaudioPath=Environment.GetEnvironmentVariable("SONIOX_VOICE_CLONE_AUDIO_PATH")is{Length:>0}path?path:thrownewAssertInconclusiveException("SONIOX_VOICE_CLONE_AUDIO_PATH environment variable is not found.");usingvarclient=newSonioxClient(apiKey);awaitusingvarreferenceAudio=System.IO.File.OpenRead(audioPath);varvoice=awaitclient.Voices.CreateVoiceAsync(name:$"sdk-example-{Guid.NewGuid():N}",file:referenceAudio,filename:System.IO.Path.GetFileName(audioPath));try{voice=awaitWaitForVoiceReadyAsync(client:client,voiceId:voice.Id,model:SonioxClient.DefaultTtsModel);varaudio=awaitclient.GenerateSpeechAsync(text:"Hello from a cloned Soniox voice.",voice:voice.Id.ToString(),language:"en",audioFormat:"wav",sampleRate:24000);}finally{awaitclient.Voices.DeleteVoiceAsync(voice.Id);}Streams text to the Soniox realtime Text-to-Speech WebSocket API. The default
test path serializes generated messages without making a network call. Set
SONIOX_RUN_REALTIME_TTS_EXAMPLE=1 to run the paid live example.
varstreamId=$"sdk-example-{Guid.NewGuid():N}";varconfig=newTtsRealtime.TtsConfig{ApiKey=GetOptionalEnvironmentVariable("SONIOX_API_KEY")??"test-key",StreamId=streamId,Model=SonioxClient.DefaultTtsModel,Language=SonioxClient.DefaultTtsLanguage,Voice="Adrian",AudioFormat=SonioxClient.DefaultTtsAudioFormat,SampleRate=24000,ReturnTimestamps=true,Speed=1.1,};vartextChunks=new[]{newTtsRealtime.TtsText{StreamId=streamId,Text="Hello from realtime ",TextEnd=false,},newTtsRealtime.TtsText{StreamId=streamId,Text="Text-to-Speech.",TextEnd=true,},};varkeepAlive=newTtsRealtime.TtsKeepAlive{KeepAlive=true};varcancel=newTtsRealtime.TtsCancel{StreamId=streamId,Cancel=true};if(!IsEnvironmentFlagEnabled(RunRealtimeTtsExampleFlag)){varconfigJson=JsonSerializer.Serialize(config,typeof(TtsRealtime.TtsConfig),TtsRealtime.TtsRealtimeSourceGenerationContext.Default);varfirstTextJson=JsonSerializer.Serialize(textChunks[0],typeof(TtsRealtime.TtsText),TtsRealtime.TtsRealtimeSourceGenerationContext.Default);varkeepAliveJson=JsonSerializer.Serialize(keepAlive,typeof(TtsRealtime.TtsKeepAlive),TtsRealtime.TtsRealtimeSourceGenerationContext.Default);varcancelJson=JsonSerializer.Serialize(cancel,typeof(TtsRealtime.TtsCancel),TtsRealtime.TtsRealtimeSourceGenerationContext.Default);configJson.Should().Contain("\"return_timestamps\":true");configJson.Should().Contain("\"speed\":1.1");return;}usingvarcancellationTokenSource=newCancellationTokenSource(TimeSpan.FromSeconds(45));awaitusingvarclient=newTtsRealtime.SonioxTtsRealtimeClient();awaitclient.ConnectAsync(keepAliveInterval:TimeSpan.FromSeconds(15),connectTimeout:TimeSpan.FromSeconds(10),cancellationToken:cancellationTokenSource.Token);config.ApiKey=GetRequiredEnvironmentVariable("SONIOX_API_KEY");awaitclient.SendTtsConfigAsync(config,cancellationTokenSource.Token);awaitclient.SendTtsTextAsync(textChunks[0],cancellationTokenSource.Token);awaitclient.SendTtsKeepAliveAsync(keepAlive,cancellationTokenSource.Token);awaitclient.SendTtsTextAsync(textChunks[1],cancellationTokenSource.Token);varresult=awaitCollectRealtimeTtsResultAsync(client:client,streamId:streamId,cancellationToken:cancellationTokenSource.Token);result.CharacterTimestampCount.Should().BeGreaterThan(0);SonioxClient implements Microsoft.Extensions.AI.ISpeechToTextClient, so the
same call site works with Soniox, Deepgram, Gladia, or any other MEAI STT
provider.
Non-streaming calls upload the audio to /v1/files, create a transcription
job on /v1/transcriptions, and poll until the job completes. Streaming
calls open a WebSocket to wss://stt-rt.soniox.com/transcribe-websocket.
usingvarclient=newSonioxClient(apiKey);// SonioxClient implements Meai.ISpeechToTextClient directly.Meai.ISpeechToTextClientspeechClient=client;// Metadata is exposed via ISpeechToTextClient.GetService.varmetadata=speechClient.GetService(typeof(Meai.SpeechToTextClientMetadata))asMeai.SpeechToTextClientMetadata;Using Soniox endpoints as AIFunction tools with any Microsoft.Extensions.AI IChatClient.
usingvarclient=newSonioxClient(apiKey);// Create AIFunction tools from the Soniox client.vartranscribeTool=client.AsTranscribeTool();vargetTool=client.AsGetTranscriptionTool();varlistModelsTool=client.AsListModelsTool();varlistLanguagesTool=client.AsListLanguagesTool();vartempKeyTool=client.AsCreateTemporaryApiKeyTool();// Verify all tools are created with the expected names.// These tools can be passed to any IChatClient for function calling.vartools=new[]{transcribeTool,getTool,listModelsTool,listLanguagesTool,tempKeyTool};This SDK is one of more than 200 .NET SDKs maintained with AutoSDK. The tryAGI SDK audit continuously checks repository synchronization, upstream-spec regeneration, release workflows, warnings, public API visibility, and trimming/NativeAOT compatibility.
Every issue is first investigated for ecosystem-wide applicability. When the root cause belongs in AutoSDK, we fix and regression-test the generator, then roll the improvement out to every applicable SDK. Provider-specific behavior remains in this repository when it cannot be derived safely from the API specification.
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