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Azure AI Speech


Downloads

Frameworks

.NET

.NET MAUI

Operating Systems

Android

iOS

Windows

Overview

Azure AI Speech provides enterprise-grade cloud speech-to-text and text-to-speech powered by Azure Cognitive Services. It replaces the platform-native ISpeechToTextService and ITextToSpeechService registrations with cloud-backed implementations while still using platform-native audio capture and playback.

Setup

NuGet Packages
Project File
MauiProgram.cs

Shiny.Speech.Azure

// In MauiProgram.cs
builder.Services.AddAudioSource();    // Platform-native microphone capture (required for STT)
builder.Services.AddAudioPlayer();    // Platform-native audio playback (required for TTS)
builder.Services.AddAzureSpeech("your-subscription-key", "eastus");

Or with a config object and selective services:

builder.Services.AddAudioSource();
builder.Services.AddAudioPlayer();
builder.Services.AddAzureSpeech(
    new AzureSpeechConfig
    {
        SubscriptionKey = "your-subscription-key",
        Region = "eastus"
    },
    speechToText: true,
    textToSpeech: true
);

Configuration

public record AzureSpeechConfig
{
    public required string SubscriptionKey { get; init; }
    public required string Region { get; init; }
}

Property	Description
`SubscriptionKey`	Your Azure Speech Services subscription key
`Region`	Azure region (e.g., `eastus`, `westus2`, `westeurope`)

Usage

Once registered, inject and use ISpeechToTextService and ITextToSpeechService exactly as you would with platform-native speech — the API is identical:

public class MyViewModel(ISpeechToTextService stt, ITextToSpeechService tts)
{
    async Task ListenAndRespond(CancellationToken ct)
    {
        var access = await stt.RequestAccess();
        if (access != AccessState.Available)
            return;

        var text = await stt.ListenUntilSilence(cancellationToken: ct);

        if (text != null)
            await tts.SpeakAsync($"You said: {text}");
    }
}

STT-Only or TTS-Only

You can register Azure for just one service:

// Azure STT only (use platform-native TTS)
builder.Services.AddAudioSource();
builder.Services.AddTextToSpeech();   // Platform-native TTS
builder.Services.AddAzureSpeech("key", "region", speechToText: true, textToSpeech: false);

// Azure TTS only (use platform-native STT)
builder.Services.AddAudioPlayer();
builder.Services.AddSpeechToText();   // Platform-native STT
builder.Services.AddAzureSpeech("key", "region", speechToText: false, textToSpeech: true);