OVOS Simple Listener

ovos-simple-listener is a lightweight alternative to ovos-dinkum-listener, designed for efficient wake word detection and speech recognition.

This listener provides a streamlined approach for integrating voice command capabilities into your applications using the Open Voice OS (OVOS) framework.

It was made to power hivemind-listener and hivemind-mic-satellite, but can also be used in place of ovos-dinkum-listener in your OVOS setups

at around 150 Lines of code, this repo is a good clean reference of how to use OVOS audio plugins in your own applications

Features

• Wake Word Detection: Supports customizable wake word engines to initiate listening.
• Voice Activity Detection (VAD): Detects silence and speech to optimize audio processing.
• Speech Recognition: Utilizes various speech-to-text (STT) engines to transcribe audio input.
• Callback System: Provides a flexible callback mechanism to handle state changes and processed audio.
• Multithreading Support: Operates in a separate thread to avoid blocking the main application flow.

While this repo is lighter than ovos-dinkum-listener, it is also missing some features

• Audio Transformers plugins
• Continuous Listening
• Hybrid Listening
• Recording Mode
• Sleep Mode
• Multiple WakeWords

Installation

To use ovos-simple-listener, clone this repository and install the necessary dependencies. You can do this using pip:

pip install ovos-simple-listener

OVOS Usage

run ovos_simple_listener/__main__.py in place of ovos-dinkum-listener, plugins are selected from the default OVOS config ~/.config/mycroft/mycroft.conf

Library Usage

To use ovos-simple-listener, you can initialize it with the desired components (microphone, STT, VAD, and wake word) as shown in the example below:

from ovos_simple_listener import SimpleListener
from ovos_plugin_manager.microphone import OVOSMicrophoneFactory
from ovos_plugin_manager.stt import OVOSSTTFactory
from ovos_plugin_manager.vad import OVOSVADFactory
from ovos_plugin_manager.wakewords import OVOSWakeWordFactory

listener = SimpleListener(
    mic=OVOSMicrophoneFactory.create(),
    vad=OVOSVADFactory.create(),
    wakeword=OVOSWakeWordFactory.create_hotword("hey_mycroft"),
    stt=OVOSSTTFactory.create()
)

listener.run()

Callbacks

You can implement your own callbacks by extending the ListenerCallbacks class to handle events such as starting a command, ending listening, processing audio, errors, and recognizing text.

from ovos_simple_listener import ListenerCallbacks

class MyCallbacks(ListenerCallbacks):
    @classmethod
    def listen_callback(cls):
        # Handle when the listener starts processing a command
        pass

    @classmethod
    def end_listen_callback(cls):
        # Handle when the listener stops processing a command
        pass

    @classmethod
    def audio_callback(cls, audio):
        # Handle processed audio data
        pass

    @classmethod
    def error_callback(cls, audio):
        # Handle STT errors
        pass

    @classmethod
    def text_callback(cls, utterance, lang):
        # Handle recognized text
        pass

Contributing

Contributions are welcome! Please open an issue or submit a pull request for any improvements or bug fixes.

Acknowledgements

• Open Voice OS for providing the framework and plugins.