---
title: "Mic | Micdrop"
description: "The Mic module provides functionality for managing microphone input and audio recording in the browser."
url: "https://micdrop.dev/docs/client/utility-classes/mic"
---

*   [Getting Started](/docs/getting-started)
*   [Client (Browser)](/docs/client)
    
    *   [Installation](/docs/client/installation)
    *   [React Hooks](/docs/client/react-hooks)
    *   [Start/Stop Call](/docs/client/start-stop-call)
    *   [Pause/Resume Call](/docs/client/pause-resume-call)
    *   [Mute/Unmute Call](/docs/client/mute-unmute-call)
    *   [Call State](/docs/client/call-state)
    *   [Display Conversation Messages](/docs/client/display-conversation-messages)
    *   [Handling Tool Calls](/docs/client/handling-tool-calls)
    *   [Device Management](/docs/client/devices-management)
    *   [Voice Activity Detection (VAD)](/docs/client/vad)
    *   [Error Handling](/docs/client/error-handling)
    *   Utility Classes
        
        *   [Mic](/docs/client/utility-classes/mic)
        *   [MicdropClient](/docs/client/utility-classes/micdrop-client)
        *   [MicRecorder](/docs/client/utility-classes/mic-recorder)
        *   [Speaker](/docs/client/utility-classes/speaker)
        
    
*   [Server (Node.js)](/docs/server)
    
    *   [Installation](/docs/server/installation)
    *   [With Fastify](/docs/server/with-fastify)
    *   [With NestJS](/docs/server/with-nestjs)
    *   [Auth and Parameters](/docs/server/auth-and-parameters)
    *   [First Message](/docs/server/first-message)
    *   [Save Messages](/docs/server/save-messages)
    *   [Resume a Conversation](/docs/server/resume-conversation)
    *   [Recording Audio](/docs/server/recording-audio)
    *   [Error Handling](/docs/server/error-handling)
    *   [Tools](/docs/server/tools)
    *   [Extract Value from Answer](/docs/server/extract)
    *   [Auto End Call](/docs/server/auto-end-call)
    *   [Semantic Turn Detection](/docs/server/semantic-turn-detection)
    *   [Noise Filtering](/docs/server/noise-filtering)
    *   [Micdrop Protocol](/docs/server/protocol)
    
*   [AI Integrations](/docs/ai-integration)
    
    *   Provided Integrations
        
        *   [AI SDK](/docs/ai-integration/provided-integrations/ai-sdk)
        *   [Cartesia](/docs/ai-integration/provided-integrations/cartesia)
        *   [ElevenLabs](/docs/ai-integration/provided-integrations/elevenlabs)
        *   [Gladia](/docs/ai-integration/provided-integrations/gladia)
        *   [Gradium](/docs/ai-integration/provided-integrations/gradium)
        *   [Mistral](/docs/ai-integration/provided-integrations/mistral)
        *   [OpenAI](/docs/ai-integration/provided-integrations/openai)
        
    *   Custom Integrations
        
        *   [Agent (LLM)](/docs/ai-integration/custom-integrations/custom-agent)
        *   [Speech-to-Text (STT)](/docs/ai-integration/custom-integrations/custom-stt)
        *   [Text-to-Speech (TTS)](/docs/ai-integration/custom-integrations/custom-tts)
        
    *   Fallback Strategies
        
        *   [FallbackAgent](/docs/ai-integration/fallback-strategies/agent-fallback)
        *   [FallbackSTT](/docs/ai-integration/fallback-strategies/stt-fallback)
        *   [FallbackTTS](/docs/ai-integration/fallback-strategies/tts-fallback)
        
    *   [IA Vocale Souveraine 🇫🇷🇪🇺](/docs/ai-integration/sovereign-voice-ai)
    

[Micdrop](/) › [Documentation](/docs/getting-started)

# Mic

The Mic module provides functionality for managing microphone input and audio recording in the browser.

## Features

*   🎤 Microphone input device management
*   🔊 Audio stream handling
*   📊 Real-time audio analysis
*   💾 Persistent device selection

## Usage Example

```
import { Mic } from '@micdrop/client'
// Start microphone with default deviceconst stream = await Mic.start()
// Start microphone with specific deviceconst deviceStream = await Mic.start('device-id')
// Stop microphone and cleanup when doneMic.stop()
// Monitor volume changes using the audio analyser// Volume is in dB range -100 to 0Mic.analyser.on('volume', (volume: number) => {  // Convert to 0-100 range for visualization if needed  const normalizedVolume = Math.max(0, volume + 100)  console.log('Current volume:', normalizedVolume)})
```

## API Reference

### Functions

#### `start(deviceId?: string): Promise<MediaStream>`

Starts the microphone and returns the audio stream.

```
const stream = await Mic.start()
```

or

```
const stream = await Mic.start(deviceId)
```

#### `stop(): void`

Stops the microphone stream and cleans up resources.

```
Mic.stop()
```

### Variables

#### `analyser`

An instance of `AudioAnalyser` that can be used to analyze the microphone input.

```
Mic.analyser.on('volume', (volume: number) => {  console.log('Current volume:', volume)})
// AnalyserNode// See https://developer.mozilla.org/docs/Web/API/AnalyserNodeconsole.log(Mic.analyser.node)
```

## Browser Support

Fully supported in Chrome, Firefox, Safari and Edge.

Requires support for:

*   Web Audio API
*   MediaDevices API

[Previous← Error Handling](/docs/client/error-handling)[NextMicdropClient →](/docs/client/utility-classes/micdrop-client)

On this page

*   [Features](#features)
*   [Usage Example](#usage-example)
*   [API Reference](#api-reference)
*   [Functions](#functions)
*   [Variables](#variables)
*   [Browser Support](#browser-support)