> Discover all available pages from the documentation index: https://mastra.zisheng.pro/ja/llms.txt

# Mastra の Voice

Mastra の Voice システムは音声対話のための統一インターフェースを提供し、アプリケーションで Text-to-Speech（TTS）、Speech-to-Text（STT）、リアルタイムの Speech-to-Speech（STS）を利用できるようにします。

## Agent に Voice を追加する

`voice` プロパティで Voice Provider を Agent に渡します。設定する Provider に応じて、同じプロパティで Text-to-Speech（TTS）、Speech-to-Text（STT）、リアルタイムの Speech-to-Speech（STS）を利用できます。

```typescript
import { Agent } from '@mastra/core/agent'
import { OpenAIVoice } from '@mastra/voice-openai'

// Initialize OpenAI voice for TTS

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new OpenAIVoice(),
})
```

これにより、次の Voice 機能を使用できます。

### Text-to-Speech（TTS）

Mastra の TTS 機能を使って、Agent の回答を自然な音声に変換します。 OpenAI や ElevenLabs など、複数の Provider から選択できます。

詳しい設定オプションと高度な機能については、[Text-to-Speech ガイド](https://mastra.zisheng.pro/ja/guides/voice/text-to-speech)を参照してください。

**OpenAI**:

```typescript
import { Agent } from '@mastra/core/agent'
import { OpenAIVoice } from '@mastra/voice-openai'
import { playAudio } from '@mastra/node-audio'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new OpenAIVoice(),
})

const { text } = await voiceAgent.generate('What color is the sky?')

// Convert text to speech to an Audio Stream
const audioStream = await voiceAgent.voice.speak(text, {
  speaker: 'default', // Optional: specify a speaker
  responseFormat: 'wav', // Optional: specify a response format
})

playAudio(audioStream)
```

OpenAI Voice Provider の詳細については、[OpenAI Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/openai)を参照してください。

**Azure**:

```typescript
import { Agent } from '@mastra/core/agent'
import { AzureVoice } from '@mastra/voice-azure'
import { playAudio } from '@mastra/node-audio'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new AzureVoice(),
})

const { text } = await voiceAgent.generate('What color is the sky?')

// Convert text to speech to an Audio Stream
const audioStream = await voiceAgent.voice.speak(text, {
  speaker: 'en-US-JennyNeural', // Optional: specify a speaker
})

playAudio(audioStream)
```

Azure Voice Provider の詳細については、[Azure Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/azure)を参照してください。

**ElevenLabs**:

```typescript
import { Agent } from '@mastra/core/agent'
import { ElevenLabsVoice } from '@mastra/voice-elevenlabs'
import { playAudio } from '@mastra/node-audio'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new ElevenLabsVoice(),
})

const { text } = await voiceAgent.generate('What color is the sky?')

// Convert text to speech to an Audio Stream
const audioStream = await voiceAgent.voice.speak(text, {
  speaker: 'default', // Optional: specify a speaker
})

playAudio(audioStream)
```

ElevenLabs Voice Provider の詳細については、[ElevenLabs Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/elevenlabs)を参照してください。

**PlayAI**:

```typescript
import { Agent } from '@mastra/core/agent'
import { PlayAIVoice } from '@mastra/voice-playai'
import { playAudio } from '@mastra/node-audio'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new PlayAIVoice(),
})

const { text } = await voiceAgent.generate('What color is the sky?')

// Convert text to speech to an Audio Stream
const audioStream = await voiceAgent.voice.speak(text, {
  speaker: 'default', // Optional: specify a speaker
})

playAudio(audioStream)
```

PlayAI Voice Provider の詳細については、[PlayAI Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/playai)を参照してください。

**Google**:

```typescript
import { Agent } from '@mastra/core/agent'
import { GoogleVoice } from '@mastra/voice-google'
import { playAudio } from '@mastra/node-audio'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new GoogleVoice(),
})

const { text } = await voiceAgent.generate('What color is the sky?')

// Convert text to speech to an Audio Stream
const audioStream = await voiceAgent.voice.speak(text, {
  speaker: 'en-US-Studio-O', // Optional: specify a speaker
})

playAudio(audioStream)
```

Google Voice Provider の詳細については、[Google Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/google)を参照してください。

**Cloudflare**:

```typescript
import { Agent } from '@mastra/core/agent'
import { CloudflareVoice } from '@mastra/voice-cloudflare'
import { playAudio } from '@mastra/node-audio'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new CloudflareVoice(),
})

const { text } = await voiceAgent.generate('What color is the sky?')

// Convert text to speech to an Audio Stream
const audioStream = await voiceAgent.voice.speak(text, {
  speaker: 'default', // Optional: specify a speaker
})

playAudio(audioStream)
```

Cloudflare Voice Provider の詳細については、[Cloudflare Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/cloudflare)を参照してください。

**Deepgram**:

```typescript
import { Agent } from '@mastra/core/agent'
import { DeepgramVoice } from '@mastra/voice-deepgram'
import { playAudio } from '@mastra/node-audio'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new DeepgramVoice(),
})

const { text } = await voiceAgent.generate('What color is the sky?')

// Convert text to speech to an Audio Stream
const audioStream = await voiceAgent.voice.speak(text, {
  speaker: 'aura-english-us', // Optional: specify a speaker
})

playAudio(audioStream)
```

Deepgram Voice Provider の詳細については、[Deepgram Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/deepgram)を参照してください。

**Inworld**:

```typescript
import { Agent } from '@mastra/core/agent'
import { InworldVoice } from '@mastra/voice-inworld'
import { playAudio } from '@mastra/node-audio'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new InworldVoice(),
})

const { text } = await voiceAgent.generate('What color is the sky?')

// Convert text to speech to an Audio Stream
const audioStream = await voiceAgent.voice.speak(text, {
  speaker: 'Dennis', // Optional: specify a speaker
})

playAudio(audioStream)
```

Inworld Voice Provider の詳細については、[Inworld Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/inworld)を参照してください。

**Speechify**:

```typescript
import { Agent } from '@mastra/core/agent'
import { SpeechifyVoice } from '@mastra/voice-speechify'
import { playAudio } from '@mastra/node-audio'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new SpeechifyVoice(),
})

const { text } = await voiceAgent.generate('What color is the sky?')

// Convert text to speech to an Audio Stream
const audioStream = await voiceAgent.voice.speak(text, {
  speaker: 'matthew', // Optional: specify a speaker
})

playAudio(audioStream)
```

Speechify Voice Provider の詳細については、[Speechify Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/speechify)を参照してください。

**Sarvam**:

```typescript
import { Agent } from '@mastra/core/agent'
import { SarvamVoice } from '@mastra/voice-sarvam'
import { playAudio } from '@mastra/node-audio'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new SarvamVoice(),
})

const { text } = await voiceAgent.generate('What color is the sky?')

// Convert text to speech to an Audio Stream
const audioStream = await voiceAgent.voice.speak(text, {
  speaker: 'shubh', // Optional: specify a bulbul:v3 speaker
})

playAudio(audioStream)
```

Sarvam Voice Provider の詳細については、[Sarvam Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/sarvam)を参照してください。

**Murf**:

```typescript
import { Agent } from '@mastra/core/agent'
import { MurfVoice } from '@mastra/voice-murf'
import { playAudio } from '@mastra/node-audio'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new MurfVoice(),
})

const { text } = await voiceAgent.generate('What color is the sky?')

// Convert text to speech to an Audio Stream
const audioStream = await voiceAgent.voice.speak(text, {
  speaker: 'default', // Optional: specify a speaker
})

playAudio(audioStream)
```

Murf Voice Provider の詳細については、[Murf Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/murf)を参照してください。

### Speech-to-Text（STT）

OpenAI や ElevenLabs などの Provider を使って音声コンテンツを文字起こしします。詳しい設定オプションについては、[Speech-to-Text](https://mastra.zisheng.pro/ja/guides/voice/speech-to-text)を参照してください。

サンプル音声ファイルは[こちら](https://github.com/mastra-ai/realtime-voice-demo/raw/refs/heads/main/how_can_i_help_you.mp3)からダウンロードできます。

[](https://github.com/mastra-ai/realtime-voice-demo/raw/refs/heads/main/how_can_i_help_you.mp3)

**OpenAI**:

```typescript
import { Agent } from '@mastra/core/agent'
import { OpenAIVoice } from '@mastra/voice-openai'
import { createReadStream } from 'fs'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new OpenAIVoice(),
})

// Use an audio file from a URL
const audioStream = await createReadStream('./how_can_i_help_you.mp3')

// Convert audio to text
const transcript = await voiceAgent.voice.listen(audioStream)
console.log(`User said: ${transcript}`)

// Generate a response based on the transcript
const { text } = await voiceAgent.generate(transcript)
```

OpenAI Voice Provider の詳細については、[OpenAI Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/openai)を参照してください。

**Azure**:

```typescript
import { createReadStream } from 'fs'
import { Agent } from '@mastra/core/agent'
import { AzureVoice } from '@mastra/voice-azure'
import { createReadStream } from 'fs'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new AzureVoice(),
})

// Use an audio file from a URL
const audioStream = await createReadStream('./how_can_i_help_you.mp3')

// Convert audio to text
const transcript = await voiceAgent.voice.listen(audioStream)
console.log(`User said: ${transcript}`)

// Generate a response based on the transcript
const { text } = await voiceAgent.generate(transcript)
```

Azure Voice Provider の詳細については、[Azure Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/azure)を参照してください。

**ElevenLabs**:

```typescript
import { Agent } from '@mastra/core/agent'
import { ElevenLabsVoice } from '@mastra/voice-elevenlabs'
import { createReadStream } from 'fs'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new ElevenLabsVoice(),
})

// Use an audio file from a URL
const audioStream = await createReadStream('./how_can_i_help_you.mp3')

// Convert audio to text
const transcript = await voiceAgent.voice.listen(audioStream)
console.log(`User said: ${transcript}`)

// Generate a response based on the transcript
const { text } = await voiceAgent.generate(transcript)
```

ElevenLabs Voice Provider の詳細については、[ElevenLabs Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/elevenlabs)を参照してください。

**Google**:

```typescript
import { Agent } from '@mastra/core/agent'
import { GoogleVoice } from '@mastra/voice-google'
import { createReadStream } from 'fs'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new GoogleVoice(),
})

// Use an audio file from a URL
const audioStream = await createReadStream('./how_can_i_help_you.mp3')

// Convert audio to text
const transcript = await voiceAgent.voice.listen(audioStream)
console.log(`User said: ${transcript}`)

// Generate a response based on the transcript
const { text } = await voiceAgent.generate(transcript)
```

Google Voice Provider の詳細については、[Google Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/google)を参照してください。

**Cloudflare**:

```typescript
import { Agent } from '@mastra/core/agent'
import { CloudflareVoice } from '@mastra/voice-cloudflare'
import { createReadStream } from 'fs'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new CloudflareVoice(),
})

// Use an audio file from a URL
const audioStream = await createReadStream('./how_can_i_help_you.mp3')

// Convert audio to text
const transcript = await voiceAgent.voice.listen(audioStream)
console.log(`User said: ${transcript}`)

// Generate a response based on the transcript
const { text } = await voiceAgent.generate(transcript)
```

Cloudflare Voice Provider の詳細については、[Cloudflare Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/cloudflare)を参照してください。

**Deepgram**:

```typescript
import { Agent } from '@mastra/core/agent'
import { DeepgramVoice } from '@mastra/voice-deepgram'
import { createReadStream } from 'fs'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new DeepgramVoice(),
})

// Use an audio file from a URL
const audioStream = await createReadStream('./how_can_i_help_you.mp3')

// Convert audio to text
const transcript = await voiceAgent.voice.listen(audioStream)
console.log(`User said: ${transcript}`)

// Generate a response based on the transcript
const { text } = await voiceAgent.generate(transcript)
```

Deepgram Voice Provider の詳細については、[Deepgram Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/deepgram)を参照してください。

**Inworld**:

```typescript
import { Agent } from '@mastra/core/agent'
import { InworldVoice } from '@mastra/voice-inworld'
import { createReadStream } from 'fs'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new InworldVoice(),
})

// Use an audio file from a URL
const audioStream = await createReadStream('./how_can_i_help_you.mp3')

// Convert audio to text
const transcript = await voiceAgent.voice.listen(audioStream)
console.log(`User said: ${transcript}`)

// Generate a response based on the transcript
const { text } = await voiceAgent.generate(transcript)
```

Inworld Voice Provider の詳細については、[Inworld Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/inworld)を参照してください。

**Sarvam**:

```typescript
import { Agent } from '@mastra/core/agent'
import { SarvamVoice } from '@mastra/voice-sarvam'
import { createReadStream } from 'fs'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new SarvamVoice(),
})

// Use an audio file from a URL
const audioStream = await createReadStream('./how_can_i_help_you.mp3')

// Convert audio to text
const transcript = await voiceAgent.voice.listen(audioStream)
console.log(`User said: ${transcript}`)

// Generate a response based on the transcript
const { text } = await voiceAgent.generate(transcript)
```

Sarvam Voice Provider の詳細については、[Sarvam Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/sarvam)を参照してください。

### Speech-to-Speech（STS）

Speech-to-Speech 機能で会話体験を構築します。統一 API により、ユーザーと AI Agent 間のリアルタイム音声対話が可能になります。 詳しい設定オプションと高度な機能については、[Speech-to-Speech](https://mastra.zisheng.pro/ja/guides/voice/speech-to-speech)を参照してください。

**OpenAI**:

```typescript
import { Agent } from '@mastra/core/agent'
import { playAudio, getMicrophoneStream } from '@mastra/node-audio'
import { OpenAIRealtimeVoice } from '@mastra/voice-openai-realtime'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new OpenAIRealtimeVoice(),
})

// Listen for agent audio responses
voiceAgent.voice.on('speaker', ({ audio }) => {
  playAudio(audio)
})

// Initiate the conversation
await voiceAgent.voice.speak('How can I help you today?')

// Send continuous audio from the microphone
const micStream = getMicrophoneStream()
await voiceAgent.voice.send(micStream)
```

OpenAI Voice Provider の詳細については、[OpenAI Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/openai-realtime)を参照してください。

**Google**:

```typescript
import { Agent } from '@mastra/core/agent'
import { playAudio, getMicrophoneStream } from '@mastra/node-audio'
import { GeminiLiveVoice } from '@mastra/voice-google-gemini-live'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new GeminiLiveVoice({
    // Live API mode
    apiKey: process.env.GOOGLE_API_KEY,
    model: 'gemini-2.0-flash-exp',
    speaker: 'Puck',
    debug: true,
    // Vertex AI alternative:
    // vertexAI: true,
    // project: 'your-gcp-project',
    // location: 'us-central1',
    // serviceAccountKeyFile: '/path/to/service-account.json',
  }),
})

// Connect before using speak/send
await voiceAgent.voice.connect()

// Listen for agent audio responses
voiceAgent.voice.on('speaker', ({ audio }) => {
  playAudio(audio)
})

// Listen for text responses and transcriptions
voiceAgent.voice.on('writing', ({ text, role }) => {
  console.log(`${role}: ${text}`)
})

// Initiate the conversation
await voiceAgent.voice.speak('How can I help you today?')

// Send continuous audio from the microphone
const micStream = getMicrophoneStream()
await voiceAgent.voice.send(micStream)
```

Google Gemini Live Voice Provider の詳細については、[Google Gemini Live リファレンス](https://mastra.zisheng.pro/ja/reference/voice/google-gemini-live)を参照してください。

**AWS Nova Sonic**:

```typescript
import { Agent } from '@mastra/core/agent'
import { playAudio, getMicrophoneStream } from '@mastra/node-audio'
import { NovaSonicVoice } from '@mastra/voice-aws-nova-sonic'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new NovaSonicVoice({
    region: 'us-east-1',
    speaker: 'matthew',
    // Static credentials are optional. The default AWS credential
    // provider chain is used when none are passed.
  }),
})

// Connect before using speak/send
await voiceAgent.voice.connect()

// Listen for assistant audio (Int16Array PCM)
voiceAgent.voice.on('speaking', ({ audioData }) => {
  if (audioData) playAudio(audioData)
})

// Listen for transcribed text
voiceAgent.voice.on('writing', ({ text, role }) => {
  console.log(`${role}: ${text}`)
})

// Initiate the conversation
await voiceAgent.voice.speak('How can I help you today?')

// Send continuous audio from the microphone
const micStream = getMicrophoneStream()
await voiceAgent.voice.send(micStream)
```

AWS Nova Sonic Voice Provider の詳細については、[AWS Nova Sonic リファレンス](https://mastra.zisheng.pro/ja/reference/voice/aws-nova-sonic)を参照してください。

**Inworld Realtime**:

```typescript
import { Agent } from '@mastra/core/agent'
import { playAudio, getMicrophoneStream } from '@mastra/node-audio'
import { InworldRealtimeVoice } from '@mastra/voice-inworld'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'openai/gpt-5.6-sol',
  voice: new InworldRealtimeVoice({
    apiKey: process.env.INWORLD_API_KEY,
    model: 'inworld/models/gemma-4-26b-a4b-it',
    speaker: 'Sarah',
  }),
})

// Connect before using speak/send
await voiceAgent.voice.connect()

// Listen for agent audio (PCM stream)
voiceAgent.voice.on('speaker', stream => {
  playAudio(stream)
})

// Listen for text responses and transcriptions
voiceAgent.voice.on('writing', ({ text, role }) => {
  console.log(`${role}: ${text}`)
})

// Initiate the conversation
await voiceAgent.voice.speak('How can I help you today?')

// Send continuous audio from the microphone
const micStream = getMicrophoneStream()
await voiceAgent.voice.send(micStream)
```

Inworld Realtime Voice Provider の詳細については、[Inworld Realtime リファレンス](https://mastra.zisheng.pro/ja/reference/voice/inworld-realtime)を参照してください。

**xAI**:

```typescript
import { Agent } from '@mastra/core/agent'
import { playAudio, getMicrophoneStream } from '@mastra/node-audio'
import { XAIRealtimeVoice } from '@mastra/voice-xai-realtime'

const voiceAgent = new Agent({
  id: 'voice-agent',
  name: 'Voice Agent',
  instructions: 'You are a voice assistant that can help users with their tasks.',
  model: 'xai/grok-4.3',
  voice: new XAIRealtimeVoice({
    apiKey: process.env.XAI_API_KEY,
    model: 'grok-voice-think-fast-1.0',
    speaker: 'eve',
    turnDetection: { type: 'server_vad' },
  }),
})

// Connect before using speak/send
await voiceAgent.voice.connect()

// Listen for agent audio responses
voiceAgent.voice.on('speaker', audioStream => {
  playAudio(audioStream)
})

// Listen for text responses and transcriptions
voiceAgent.voice.on('writing', ({ text, role }) => {
  console.log(`${role}: ${text}`)
})

// Initiate the conversation
await voiceAgent.voice.speak('How can I help you today?')

// Send continuous audio from the microphone
const micStream = getMicrophoneStream()
await voiceAgent.voice.send(micStream)
```

xAI Voice Provider の詳細については、[xAI Realtime Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/xai-realtime)を参照してください。

### リアルタイム Voice

ブラウザまたは電話で、ユーザーが割り込んで話せるライブ通話を実行します。Mastra は音声ループを LiveKit に任せ、音声区間検出、意味に基づくターン検出、割り込みを処理します。一方、Agent は独自のモデル、Tools、Memory を使って各応答を生成します。セットアップと設定オプションについては、[リアルタイム Voice](https://mastra.zisheng.pro/ja/guides/voice/realtime-voice)を参照してください。

## Voice の設定

各 Voice Provider には、異なるモデルとオプションを設定できます。サポートするすべての Provider の詳しい設定オプションを次に示します。

**OpenAI**:

```typescript
// OpenAI Voice Configuration
const voice = new OpenAIVoice({
  speechModel: {
    name: 'gpt-3.5-turbo', // Example model name
    apiKey: process.env.OPENAI_API_KEY,
    language: 'en-US', // Language code
    voiceType: 'neural', // Type of voice model
  },
  listeningModel: {
    name: 'whisper-1', // Example model name
    apiKey: process.env.OPENAI_API_KEY,
    language: 'en-US', // Language code
    format: 'wav', // Audio format
  },
  speaker: 'alloy', // Example speaker name
})
```

OpenAI Voice Provider の詳細については、[OpenAI Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/openai)を参照してください。

**Azure**:

```typescript
// Azure Voice Configuration
const voice = new AzureVoice({
  speechModel: {
    name: 'en-US-JennyNeural', // Example model name
    apiKey: process.env.AZURE_SPEECH_KEY,
    region: process.env.AZURE_SPEECH_REGION,
    language: 'en-US', // Language code
    style: 'cheerful', // Voice style
    pitch: '+0Hz', // Pitch adjustment
    rate: '1.0', // Speech rate
  },
  listeningModel: {
    name: 'en-US', // Example model name
    apiKey: process.env.AZURE_SPEECH_KEY,
    region: process.env.AZURE_SPEECH_REGION,
    format: 'simple', // Output format
  },
})
```

Azure Voice Provider の詳細については、[Azure Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/azure)を参照してください。

**ElevenLabs**:

```typescript
// ElevenLabs Voice Configuration
const voice = new ElevenLabsVoice({
  speechModel: {
    voiceId: 'your-voice-id', // Example voice ID
    model: 'eleven_multilingual_v2', // Example model name
    apiKey: process.env.ELEVENLABS_API_KEY,
    language: 'en', // Language code
    emotion: 'neutral', // Emotion setting
  },
  // ElevenLabs may not have a separate listening model
})
```

ElevenLabs Voice Provider の詳細については、[ElevenLabs Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/elevenlabs)を参照してください。

**PlayAI**:

```typescript
// PlayAI Voice Configuration
const voice = new PlayAIVoice({
  speechModel: {
    name: 'playai-voice', // Example model name
    speaker: 'emma', // Example speaker name
    apiKey: process.env.PLAYAI_API_KEY,
    language: 'en-US', // Language code
    speed: 1.0, // Speech speed
  },
  // PlayAI may not have a separate listening model
})
```

PlayAI Voice Provider の詳細については、[PlayAI Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/playai)を参照してください。

**Google**:

```typescript
// Google Voice Configuration
const voice = new GoogleVoice({
  speechModel: {
    name: 'en-US-Studio-O', // Example model name
    apiKey: process.env.GOOGLE_API_KEY,
    languageCode: 'en-US', // Language code
    gender: 'FEMALE', // Voice gender
    speakingRate: 1.0, // Speaking rate
  },
  listeningModel: {
    name: 'en-US', // Example model name
    sampleRateHertz: 16000, // Sample rate
  },
})
```

Google Voice Provider の詳細については、[Google Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/google)を参照してください。

**Cloudflare**:

```typescript
// Cloudflare Voice Configuration
const voice = new CloudflareVoice({
  speechModel: {
    name: 'cloudflare-voice', // Example model name
    accountId: process.env.CLOUDFLARE_ACCOUNT_ID,
    apiToken: process.env.CLOUDFLARE_API_TOKEN,
    language: 'en-US', // Language code
    format: 'mp3', // Audio format
  },
  // Cloudflare may not have a separate listening model
})
```

Cloudflare Voice Provider の詳細については、[Cloudflare Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/cloudflare)を参照してください。

**Deepgram**:

```typescript
// Deepgram Voice Configuration
const voice = new DeepgramVoice({
  speechModel: {
    name: 'nova-2', // Example model name
    speaker: 'aura-english-us', // Example speaker name
    apiKey: process.env.DEEPGRAM_API_KEY,
    language: 'en-US', // Language code
    tone: 'formal', // Tone setting
  },
  listeningModel: {
    name: 'nova-2', // Example model name
    format: 'flac', // Audio format
  },
})
```

Deepgram Voice Provider の詳細については、[Deepgram Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/deepgram)を参照してください。

**Inworld**:

```typescript
// Inworld Voice Configuration
const voice = new InworldVoice({
  speechModel: {
    name: 'inworld-tts-2',
    apiKey: process.env.INWORLD_API_KEY,
  },
  listeningModel: {
    name: 'groq/whisper-large-v3',
    apiKey: process.env.INWORLD_API_KEY,
  },
  speaker: 'Dennis',
  audioEncoding: 'MP3',
  sampleRateHertz: 48000,
  language: 'en-US',
})

// Per-call options: `deliveryMode` is honored only by `inworld-tts-2`.
const audioStream = await voice.speak('Hello!', {
  deliveryMode: 'BALANCED', // 'STABLE' | 'BALANCED' | 'CREATIVE'
  language: 'en-US', // BCP-47 per-call override
})
```

Inworld Voice Provider の詳細については、[Inworld Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/inworld)を参照してください。

**Speechify**:

```typescript
// Speechify Voice Configuration
const voice = new SpeechifyVoice({
  speechModel: {
    name: 'speechify-voice', // Example model name
    speaker: 'matthew', // Example speaker name
    apiKey: process.env.SPEECHIFY_API_KEY,
    language: 'en-US', // Language code
    speed: 1.0, // Speech speed
  },
  // Speechify may not have a separate listening model
})
```

Speechify Voice Provider の詳細については、[Speechify Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/speechify)を参照してください。

**Sarvam**:

```typescript
// Sarvam Voice Configuration
const voice = new SarvamVoice({
  speechModel: {
    model: 'bulbul:v3', // TTS model (bulbul:v2 or bulbul:v3)
    apiKey: process.env.SARVAM_API_KEY,
    language: 'en-IN', // BCP-47 language code
  },
  listeningModel: {
    model: 'saarika:v2.5', // STT model (saarika:v2.5 or saaras:v3)
    apiKey: process.env.SARVAM_API_KEY,
  },
  speaker: 'shubh', // Default bulbul:v3 speaker
})
```

Sarvam Voice Provider の詳細については、[Sarvam Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/sarvam)を参照してください。

**Murf**:

```typescript
// Murf Voice Configuration
const voice = new MurfVoice({
  speechModel: {
    name: 'murf-voice', // Example model name
    apiKey: process.env.MURF_API_KEY,
    language: 'en-US', // Language code
    emotion: 'happy', // Emotion setting
  },
  // Murf may not have a separate listening model
})
```

Murf Voice Provider の詳細については、[Murf Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/murf)を参照してください。

**OpenAI Realtime**:

```typescript
// OpenAI Realtime Voice Configuration
const voice = new OpenAIRealtimeVoice({
  speechModel: {
    name: 'gpt-3.5-turbo', // Example model name
    apiKey: process.env.OPENAI_API_KEY,
    language: 'en-US', // Language code
  },
  listeningModel: {
    name: 'whisper-1', // Example model name
    apiKey: process.env.OPENAI_API_KEY,
    format: 'ogg', // Audio format
  },
  speaker: 'alloy', // Example speaker name
})
```

OpenAI Realtime Voice Provider の詳細については、[OpenAI Realtime Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/openai-realtime)を参照してください。

**xAI Realtime**:

```typescript
// xAI Realtime Voice Configuration
const voice = new XAIRealtimeVoice({
  apiKey: process.env.XAI_API_KEY,
  model: 'grok-voice-think-fast-1.0',
  speaker: 'eve',
  instructions: 'You are a concise voice assistant.',
  turnDetection: {
    type: 'server_vad',
    threshold: 0.85,
    silence_duration_ms: 1000,
    prefix_padding_ms: 333,
  },
  audio: {
    input: { format: { type: 'audio/pcm', rate: 24000 } },
    output: { format: { type: 'audio/pcm', rate: 24000 } },
  },
  serverTools: [
    { type: 'web_search' },
    {
      type: 'mcp',
      server_url: 'https://mcp.example.com/mcp',
      server_label: 'business-tools',
    },
  ],
})
```

xAI Realtime Voice Provider の詳細については、[xAI Realtime Voice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/xai-realtime)を参照してください。

**Google Gemini Live**:

```typescript
// Google Gemini Live Voice Configuration
const voice = new GeminiLiveVoice({
  speechModel: {
    name: 'gemini-2.0-flash-exp', // Example model name
    apiKey: process.env.GOOGLE_API_KEY,
  },
  speaker: 'Puck', // Example speaker name
  // Google Gemini Live is a realtime bidirectional API without separate speech and listening models
})
```

Google Gemini Live Voice Provider の詳細については、[Google Gemini Live リファレンス](https://mastra.zisheng.pro/ja/reference/voice/google-gemini-live)を参照してください。

**AWS Nova Sonic**:

```typescript
// AWS Nova Sonic Voice Configuration
const voice = new NovaSonicVoice({
  region: 'us-east-1',
  speaker: 'matthew',
  sessionConfig: {
    inferenceConfiguration: {
      temperature: 0.7,
      maxTokens: 1024,
    },
    turnDetectionConfiguration: {
      endpointingSensitivity: 'MEDIUM',
    },
  },
  // AWS Nova Sonic is a realtime bidirectional API without separate speech and listening models
})
```

AWS Nova Sonic Voice Provider の詳細については、[AWS Nova Sonic リファレンス](https://mastra.zisheng.pro/ja/reference/voice/aws-nova-sonic)を参照してください。

**Inworld Realtime**:

```typescript
// Inworld Realtime Voice Configuration
const voice = new InworldRealtimeVoice({
  apiKey: process.env.INWORLD_API_KEY,
  model: 'inworld/models/gemma-4-26b-a4b-it',
  speaker: 'Sarah',
  // Typed Inworld realtime knobs (semantic VAD, playback speed, MCP tool routing, ...)
  session: {
    audio: {
      output: { speed: 1.1 },
      input: { turn_detection: { type: 'semantic_vad', eagerness: 'high' } },
    },
  },
})
```

Inworld Realtime Voice Provider の詳細については、[Inworld Realtime リファレンス](https://mastra.zisheng.pro/ja/reference/voice/inworld-realtime)を参照してください。

**AI SDK**:

```typescript
// AI SDK Voice Configuration
import { CompositeVoice } from '@mastra/core/voice'
import { openai } from '@ai-sdk/openai'
import { elevenlabs } from '@ai-sdk/elevenlabs'

// Use AI SDK models directly - no need to install separate packages
const voice = new CompositeVoice({
  input: openai.transcription('whisper-1'), // AI SDK transcription
  output: elevenlabs.speech('eleven_turbo_v2'), // AI SDK speech
})

// Works seamlessly with your agent
const voiceAgent = new Agent({
  id: 'aisdk-voice-agent',
  name: 'AI SDK Voice Agent',
  instructions: 'You are a helpful assistant with voice capabilities.',
  model: 'openai/gpt-5.6-sol',
  voice,
})
```

### 複数の Voice Provider を使用する

この例では、Mastra で 2 つの異なる Voice Provider を作成して使用する方法を示します。Speech-to-Text（STT）には OpenAI、Text-to-Speech（TTS）には PlayAI を使用します。

まず、必要な設定を指定して Voice Provider のインスタンスを作成します。

```typescript
import { OpenAIVoice } from '@mastra/voice-openai'
import { PlayAIVoice } from '@mastra/voice-playai'
import { CompositeVoice } from '@mastra/core/voice'
import { playAudio, getMicrophoneStream } from '@mastra/node-audio'

// Initialize OpenAI voice for STT
const input = new OpenAIVoice({
  listeningModel: {
    name: 'whisper-1',
    apiKey: process.env.OPENAI_API_KEY,
  },
})

// Initialize PlayAI voice for TTS
const output = new PlayAIVoice({
  speechModel: {
    name: 'playai-voice',
    apiKey: process.env.PLAYAI_API_KEY,
  },
})

// Combine the providers using CompositeVoice
const voice = new CompositeVoice({
  input,
  output,
})

// Implement voice interactions using the combined voice provider
const audioStream = getMicrophoneStream() // Assume this function gets audio input
const transcript = await voice.listen(audioStream)

// Log the transcribed text
console.log('Transcribed text:', transcript)

// Convert text to speech
const responseAudio = await voice.speak(`You said: ${transcript}`, {
  speaker: 'default', // Optional: specify a speaker,
  responseFormat: 'wav', // Optional: specify a response format
})

// Play the audio response
playAudio(responseAudio)
```

### AI SDK Model Provider を使用する

`CompositeVoice` では AI SDK モデルを直接使用することもできます。

```typescript
import { CompositeVoice } from '@mastra/core/voice'
import { openai } from '@ai-sdk/openai'
import { elevenlabs } from '@ai-sdk/elevenlabs'
import { playAudio, getMicrophoneStream } from '@mastra/node-audio'

// Use AI SDK models directly - no provider setup needed
const voice = new CompositeVoice({
  input: openai.transcription('whisper-1'), // AI SDK transcription
  output: elevenlabs.speech('eleven_turbo_v2'), // AI SDK speech
})

// Works the same way as Mastra providers
const audioStream = getMicrophoneStream()
const transcript = await voice.listen(audioStream)

console.log('Transcribed text:', transcript)

// Convert text to speech
const responseAudio = await voice.speak(`You said: ${transcript}`, {
  speaker: 'Rachel', // ElevenLabs voice
})

playAudio(responseAudio)
```

AI SDK モデルと Mastra Provider を組み合わせることもできます。

```typescript
import { CompositeVoice } from '@mastra/core/voice'
import { PlayAIVoice } from '@mastra/voice-playai'
import { groq } from '@ai-sdk/groq'

const voice = new CompositeVoice({
  input: groq.transcription('whisper-large-v3'), // AI SDK for STT
  output: new PlayAIVoice(), // Mastra provider for TTS
})
```

CompositeVoice の詳細については、[CompositeVoice リファレンス](https://mastra.zisheng.pro/ja/reference/voice/composite-voice)を参照してください。

## その他のリソース

- [CompositeVoice](https://mastra.zisheng.pro/ja/reference/voice/composite-voice)
- [MastraVoice](https://mastra.zisheng.pro/ja/reference/voice/mastra-voice)
- [OpenAI Voice](https://mastra.zisheng.pro/ja/reference/voice/openai)
- [OpenAI Realtime Voice](https://mastra.zisheng.pro/ja/reference/voice/openai-realtime)
- [xAI Realtime Voice](https://mastra.zisheng.pro/ja/reference/voice/xai-realtime)
- [Azure Voice](https://mastra.zisheng.pro/ja/reference/voice/azure)
- [Google Voice](https://mastra.zisheng.pro/ja/reference/voice/google)
- [Google Gemini Live Voice](https://mastra.zisheng.pro/ja/reference/voice/google-gemini-live)
- [AWS Nova Sonic Voice](https://mastra.zisheng.pro/ja/reference/voice/aws-nova-sonic)
- [Deepgram Voice](https://mastra.zisheng.pro/ja/reference/voice/deepgram)
- [Inworld Voice](https://mastra.zisheng.pro/ja/reference/voice/inworld)
- [LiveKit](https://mastra.zisheng.pro/ja/reference/voice/livekit)
- [PlayAI Voice](https://mastra.zisheng.pro/ja/reference/voice/playai)
- [Voice の例](https://github.com/mastra-ai/voice-examples)