Open Voice OS - Product screenshot

Overview

Open Voice OS (OVOS) is an open-source voice AI platform designed for creating custom voice-controlled interfaces. It integrates Natural Language Processing (NLP), offers a customizable user interface, and prioritizes privacy and security. The platform is community-driven, with contributions from developers across various Linux and FOSS communities, making it an experimental playground for cutting-edge voice assistance technology.

Installation is streamlined via an interactive browser-based installer, guiding users through device selection (Raspberry Pi, Mycroft devices, laptops, desktops) and voice options, including wake words and speech engines. OVOS supports a multi-platform approach, suitable for embedded headless devices, single-board computers, and small touch-friendly screens. Pre-built images are available for Raspberry Pi and Mycroft devices, alongside Docker containers for other systems.

The platform features a plugin-based architecture for both Speech-to-Text (STT) and Text-to-Speech (TTS) engines, allowing users to configure options like Vosk or Mozilla DeepSpeech for local STT, and Mimic3, Google TTS, or Amazon Polly for TTS. Core functionalities include creating voice assistants with customizable wake words, controlling smart home devices, playing media, answering questions, setting timers, and extending capabilities through a marketplace of community-developed skills or by creating new ones. While core operations can run offline, default STT and some skills may require an internet connection.

Key features

  • Community-driven and open-source voice AI platform
  • Customizable voice-controlled interfaces with NLP
  • Focus on privacy and security
  • Multi-platform support (Raspberry Pi, Mycroft, Linux desktops/laptops, Docker)
  • Interactive browser-based installer for easy setup
  • Plugin-based architecture for STT and TTS engines
  • Extendable functionality with community-developed skills
  • Offline operation for core components (some features require internet)

Who uses it

Developers, contributors, and DIY enthusiasts interested in creating or experimenting with open-source voice assistance technology for various embedded systems and personal devices.

Pros

  • Completely free and open-source under Apache License 2.0, allowing broad use and modification.
  • Community-driven development fosters innovation and broad support for various platforms.
  • Highly customizable with a plugin-based architecture for STT/TTS engines.
  • Supports a wide range of hardware platforms, including Raspberry Pi and Linux desktops.
  • Offers offline capabilities for core operations, enhancing privacy and reliability.

Cons

  • Some essential features, such as the default speech-to-text engine, currently require an internet connection.
  • Being community-driven, commercial-grade support or guaranteed long-term feature development may be less structured than proprietary solutions.
  • Requires a degree of technical knowledge for setup and advanced customization, especially for offline configurations.

Our take

Open Voice OS provides a robust, flexible foundation for developers and hobbyists to build and customize voice assistants, emphasizing open-source principles and device compatibility. Its modular design allows for extensive personalization and integration into various projects.

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