EVS-Embedded-Voice-System/mumble-bridge

EVS Mumble Bridge

Single-device UDP-to-Mumble bridge.

Purpose

This service receives PCM16LE mono audio over UDP from one EVS client and forwards it as a dedicated Mumble user.

Deploy one container per EVS client so every device appears as its own Mumble user.

Required ENV

• MUMBLE_HOST: Mumble server host/IP
• MUMBLE_PORT: default 64738
• MUMBLE_USERNAME: username for this EVS client (example: EVS-esp32-evs-1)
• MUMBLE_PASSWORD: optional
• UDP_LISTEN_PORT: UDP port this client will stream to

Optional ENV

• DEVICE_ID: label for logs (default esp32-evs-1)
• MUMBLE_CHANNEL: move bot to channel name after connect
  • nested path is supported: KHNM/EVS
• MUMBLE_CHANNEL_ID: move bot by numeric channel ID (takes precedence over MUMBLE_CHANNEL)
• MUMBLE_CONNECT_TIMEOUT_SEC: wait time for ready state (default 30)
• MUMBLE_CONNECT_STRICT: true|false (default false)
  • false: continue even if is_ready() does not become true in time
  • true: fail and reconnect on timeout
• INPUT_SAMPLE_RATE: default 16000
• MUMBLE_SAMPLE_RATE: default 48000
• MUMBLE_FRAME_MS: default 20
• MUMBLE_AUDIO_GAIN: default 1.0

Example docker compose service

services:
  evs-mumble-esp32-1:
    image: git.khnm-zimmerling.de/kai/evs-mumble-bridge:latest
    container_name: evs-mumble-esp32-1
    restart: unless-stopped
    ports:
      - "5004:5004/udp"
    environment:
      DEVICE_ID: "esp32-evs-1"
      UDP_LISTEN_HOST: "0.0.0.0"
      UDP_LISTEN_PORT: "5004"
      INPUT_SAMPLE_RATE: "16000"
      MUMBLE_HOST: "10.100.3.50"
      MUMBLE_PORT: "64738"
      MUMBLE_USERNAME: "EVS-esp32-evs-1"
      MUMBLE_PASSWORD: ""
      MUMBLE_CHANNEL: "Bots"