VoiceMode Configuration Guide

VoiceMode Configuration Guide

VoiceMode provides flexible configuration through environment variables and configuration files, following standard precedence rules while maintaining sensible defaults.

Note: The Python package is called voice-mode but the preferred command is voicemode.

Quick Start

VoiceMode works out of the box with minimal configuration:

With Cloud Voice Services

# Just need an OpenAI API key
export OPENAI_API_KEY="your-api-key"

With Local Voice Services

# Install local services
voicemode service install kokoro
voicemode service install whisper

# Enable auto-start at boot/login
voicemode service enable kokoro
voicemode service enable whisper

# VoiceMode auto-detects them!

Hybrid Setup (Recommended)

# Use local services with cloud fallback
export OPENAI_API_KEY="your-api-key"  # Fallback
# Local services auto-detected when running

Configuration System

Configuration Precedence

VoiceMode follows standard configuration precedence (highest to lowest):

1. Command line flags - Always win
2. Environment variables - Override config files
3. Project config - ./voicemode.env in current directory
4. User config - ~/.voicemode/voicemode.env
5. Auto-discovered services - Running local services
6. Built-in defaults - Sensible fallbacks

Configuration Files

VoiceMode automatically creates ~/.voicemode/voicemode.env on first run with basic settings. This file uses shell export format:

# ~/.voicemode/voicemode.env example
export OPENAI_API_KEY="sk-..."
export VOICEMODE_VOICES="af_sky,nova"
export VOICEMODE_DEBUG=false

MCP Configuration

When used as an MCP server, add to your Claude or other MCP client configuration:

{
  "mcpServers": {
    "voicemode": {
      "command": "uvx",
      "args": ["--refresh", "voice-mode"],
      "env": {
        "OPENAI_API_KEY": "your-key-here"
      }
    }
  }
}

Configuration Reference

API Keys and Authentication

# OpenAI API Key (for cloud TTS/STT)
OPENAI_API_KEY=sk-...

# LiveKit credentials (for room-based voice)
LIVEKIT_API_KEY=devkey          # Default for local dev
LIVEKIT_API_SECRET=secret        # Default for local dev

Voice Services

Text-to-Speech (TTS)

# TTS Service URLs (comma-separated, tried in order)
VOICEMODE_TTS_BASE_URLS=http://127.0.0.1:8880/v1,https://api.openai.com/v1

# Voice preferences (comma-separated)
# OpenAI: alloy, echo, fable, onyx, nova, shimmer
# Kokoro: af_sky, af_sarah, am_adam, bf_emma, etc.
VOICEMODE_VOICES=af_sky,nova,alloy

# TTS Models (comma-separated)
# OpenAI: tts-1, tts-1-hd, gpt-4o-mini-tts
VOICEMODE_TTS_MODELS=tts-1-hd,tts-1

# Default TTS voice and model
VOICEMODE_TTS_VOICE=nova
VOICEMODE_TTS_MODEL=tts-1-hd

# Speech speed (0.25 to 4.0)
VOICEMODE_TTS_SPEED=1.0

Speech-to-Text (STT)

# STT Service URLs
VOICEMODE_STT_BASE_URLS=http://127.0.0.1:2022/v1,https://api.openai.com/v1

# Whisper configuration
VOICEMODE_WHISPER_MODEL=large-v2    # Model size
VOICEMODE_WHISPER_LANGUAGE=auto     # Language detection
VOICEMODE_WHISPER_PORT=2022         # Server port

Audio Configuration

# Audio formats
VOICEMODE_AUDIO_FORMAT=pcm          # Global default
VOICEMODE_TTS_AUDIO_FORMAT=pcm      # TTS-specific
VOICEMODE_STT_AUDIO_FORMAT=mp3      # STT-specific

# Supported formats: pcm, opus, mp3, wav, flac, aac

# Quality settings
VOICEMODE_OPUS_BITRATE=32000        # Opus bitrate (bps)
VOICEMODE_MP3_BITRATE=64k           # MP3 bitrate
VOICEMODE_AAC_BITRATE=64k           # AAC bitrate
VOICEMODE_SAMPLE_RATE=24000         # Sample rate (Hz)

Audio Feedback

# Chimes when recording starts/stops
VOICEMODE_AUDIO_FEEDBACK=true
VOICEMODE_FEEDBACK_STYLE=whisper    # or "shout"

# Silence around chimes (for Bluetooth)
VOICEMODE_CHIME_PRE_DELAY=1.0   # Seconds before
VOICEMODE_CHIME_POST_DELAY=0.5  # Seconds after

Voice Activity Detection

# VAD Aggressiveness (0-3)
# 0: Least aggressive (captures more)
# 3: Most aggressive (filters more)
VOICEMODE_VAD_AGGRESSIVENESS=3

# Silence detection
VOICEMODE_SILENCE_THRESHOLD=3.0     # Seconds of silence
VOICEMODE_MIN_RECORDING_TIME=0.5    # Minimum recording
VOICEMODE_MAX_RECORDING_TIME=120.0  # Maximum recording

LiveKit Configuration

# Server settings
LIVEKIT_URL=ws://127.0.0.1:7880
LIVEKIT_PORT=7880

# Room settings
VOICEMODE_LIVEKIT_ROOM_PREFIX=voicemode
VOICEMODE_LIVEKIT_AUTO_CREATE=true

HTTP Server Configuration

When running VoiceMode as a remote HTTP service:

# Server settings
VOICEMODE_SERVE_HOST=127.0.0.1      # Bind address (0.0.0.0 for all interfaces)
VOICEMODE_SERVE_PORT=8765           # Port number
VOICEMODE_SERVE_TRANSPORT=streamable-http  # Transport: streamable-http or sse

# Security: Network access control
VOICEMODE_SERVE_ALLOW_LOCAL=true    # Allow localhost connections
VOICEMODE_SERVE_ALLOW_ANTHROPIC=false  # Allow Anthropic IP ranges
VOICEMODE_SERVE_ALLOW_TAILSCALE=false  # Allow Tailscale IP ranges
VOICEMODE_SERVE_ALLOWED_IPS=        # Custom CIDR ranges (comma-separated)

# Security: Authentication
VOICEMODE_SERVE_SECRET=             # File path containing shared secret
VOICEMODE_SERVE_TOKEN=              # Bearer token for authentication

# Logging
VOICEMODE_SERVE_LOG_LEVEL=info      # Log level: debug, info, warning, error

Quick Start:

# Start VoiceMode HTTP server
voicemode service start voicemode

# Enable auto-start at boot/login
voicemode service enable voicemode

# Check status
voicemode service status voicemode

Local Service Paths

# Kokoro TTS
VOICEMODE_KOKORO_PORT=8880
VOICEMODE_KOKORO_MODELS_DIR=~/Models/kokoro
VOICEMODE_KOKORO_CACHE_DIR=~/.voicemode/cache/kokoro

# Service directories
VOICEMODE_DATA_DIR=~/.voicemode
VOICEMODE_LOG_DIR=~/.voicemode/logs
VOICEMODE_CACHE_DIR=~/.voicemode/cache

Debugging and Logging

# Debug mode (verbose logging, saves all files)
VOICEMODE_DEBUG=true

# Logging levels
VOICEMODE_LOG_LEVEL=info           # debug, info, warning, error
VOICEMODE_SAVE_ALL=false           # Save all audio files
VOICEMODE_SAVE_RECORDINGS=false    # Save input recordings
VOICEMODE_SAVE_TTS=false           # Save TTS output

# Event logging
VOICEMODE_EVENT_LOG=false          # Log all events
VOICEMODE_CONVERSATION_LOG=false   # Log conversations

Development Settings

# Skip TTS for faster development
VOICEMODE_SKIP_TTS=false

# Disable specific features
VOICEMODE_DISABLE_SILENCE_DETECTION=false
VOICEMODE_DISABLE_VAD=false

Voice Preferences System

VoiceMode supports project-specific voice preferences. Create a .voicemode.env file in your project root:

# Project-specific voices for a game
export VOICEMODE_VOICES="onyx,fable"
export VOICEMODE_TTS_SPEED=0.9

This allows different projects to have different voice settings without changing global configuration.

Service Auto-Discovery

VoiceMode automatically discovers running local services:

1. Whisper STT: Checks http://127.0.0.1:2022/v1
2. Kokoro TTS: Checks http://127.0.0.1:8880/v1
3. LiveKit: Checks ws://127.0.0.1:7880

No configuration needed when services run on default ports!

Configuration Philosophy

VoiceMode balances MCP compliance with user convenience:

• Host configuration is authoritative - Environment variables always win
• Reasonable defaults - Works without any configuration
• Progressive disclosure - Simple configs for basic use, advanced options available
• File-based convenience - Edit familiar config files instead of multiple host configs

Common Configurations

Privacy-Focused Local Setup

# No cloud services, everything local
export VOICEMODE_TTS_BASE_URLS=http://127.0.0.1:8880/v1
export VOICEMODE_STT_BASE_URLS=http://127.0.0.1:2022/v1
export VOICEMODE_VOICES=af_sky

High-Quality Cloud Setup

# Best quality with OpenAI
export OPENAI_API_KEY=sk-...
export VOICEMODE_TTS_MODEL=tts-1-hd
export VOICEMODE_VOICES=nova,alloy

Troubleshooting Configuration

Check Active Configuration

# List all configuration keys
voicemode config list

# Get specific settings
voicemode config get VOICEMODE_TTS_VOICE
voicemode config get OPENAI_API_KEY

Configuration Not Working?

1. Check precedence: Environment variables override files
2. Verify syntax: Use export VAR=value format in files
3. Check permissions: Ensure config files are readable
4. Test services: Verify local services are running
5. Enable debug: Set VOICEMODE_DEBUG=true for details

Reset Configuration

# Backup and recreate default config
mv ~/.voicemode/voicemode.env ~/.voicemode/voicemode.env.backup
# Edit the configuration file to reset
voicemode config edit

Claude Code Permissions

When using VoiceMode with Claude Code, you can configure automatic tool approval to skip permission prompts.

Quick Setup

Add to .claude/settings.local.json in your project:

{
  "permissions": {
    "allow": [
      "mcp__voicemode__converse"
    ]
  }
}

To also allow service management (start/stop/status):

{
  "permissions": {
    "allow": [
      "mcp__voicemode__converse",
      "mcp__voicemode__service"
    ]
  }
}

Settings File Locations

Allowing All VoiceMode Tools

To allow all tools from the VoiceMode server:

{
  "permissions": {
    "allow": ["mcp__voicemode"]
  }
}

Note: Wildcards like mcp__voicemode__* are not supported. Use mcp__voicemode without a tool suffix.

Useful Commands

• /permissions - View and manage tool permission rules

See the Claude Code Settings documentation for more details.

Security Considerations

General Security

• Never commit API keys to version control
• Use environment variables for sensitive data in production
• Restrict file permissions: chmod 600 ~/.voicemode/voicemode.env
• Rotate keys regularly if exposed
• Use local services for sensitive audio data

HTTP Server Security

When running VoiceMode as an HTTP service for remote access, follow these best practices:

1. Bind to Localhost by Default

The safest configuration binds only to localhost:

VOICEMODE_SERVE_HOST=127.0.0.1

This prevents network access entirely. Use a secure tunnel (Tailscale, Cloudflare Tunnel) for remote access.

2. Use Network Access Controls

When exposing to a network, restrict access:

# Allow only Tailscale connections (100.64.0.0/10)
VOICEMODE_SERVE_ALLOW_TAILSCALE=true
VOICEMODE_SERVE_HOST=0.0.0.0

# Or allow specific IP ranges
VOICEMODE_SERVE_ALLOWED_IPS=192.168.1.0/24,10.0.0.0/8

3. Enable Authentication for Remote Access

Use bearer token authentication when exposing beyond localhost:

# Generate a secure token
openssl rand -hex 32 > ~/.voicemode/serve.token

# Configure VoiceMode to use it
VOICEMODE_SERVE_TOKEN=$(cat ~/.voicemode/serve.token)

Clients must include Authorization: Bearer <token> in requests.

4. Use Secure Tunnels for Internet Access

For internet access, use a secure tunnel instead of direct exposure:

• Tailscale: Zero-config VPN for secure remote access
• Cloudflare Tunnel: Secure tunnel without opening ports
• ngrok: Quick tunnels for testing (not recommended for production)

5. Monitor Service Logs

Regularly check logs for unauthorized access attempts:

# View service logs
voicemode service logs voicemode -n 100

# On macOS, also check:
log show --predicate 'process == "voicemode"' --last 1h

Security Mode Summary