Mycroft Precise

Install latest/edge of Mycroft Precise

Ubuntu 16.04 or later?

Make sure snap support is enabled in your Desktop store.

Install using the command line

sudo snap install mycroft-precise --edge

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Mycroft Precise is only available on the unstable edge channel. It could break and change often.

Channel Version Published

A wake word listener from Mycroft AI

A lightweight, simple-to-use, wake word listener, including all the tools to train your own custom wake word using a recurrent neural network.

Mycroft Precise monitors an audio stream (usually a microphone) and when it recognizes a specific phrase it triggers an event. For example, by default users of the Mycroft Voice Assistant are using a Precise model trained to spot the phrase "Hey Mycroft". When Precise recognizes this phrase it puts the Mycroft Voice Assistant into command mode performing speech recognition on whatever is next said by the person using the device.

Mycroft Precise is fully open source and can be trained to recognize any short-phrase or sound, from a name to a cough.

The default "Hey Mycroft" model is included. To try it out, run:
mycroft-precise.listen /snap/mycroft-precise/current/hey-mycroft/hey-mycroft.pb


Running the listener

  • mycroft-precise - Alias for mycroft-precise.engine
  • mycroft-precise.engine - Run a model on raw audio data from stdin
  • mycroft-precise.listen - Run a model on microphone audio input
  • mycroft-precise.listen-pocketsphinx - Run the PocketSphinx listener

Data collection

  • mycroft-precise.collect - Record audio samples for use with Precise
  • mycroft-precise.add-noise - Create a duplicate dataset with added noise


  • mycroft-precise.train - Train a new model on a dataset
  • mycroft-precise.train-generated - Train a model on infinitely generated batches
  • mycroft-precise.train-incremental - Train a model to inhibit activation by marking false activations and retraining
  • mycroft-precise.train-optimize - Use black box optimization to tune model hyperparameters
  • mycroft-precise.train-sampled - Train a model, sampling data points with the highest loss from a larger dataset

Evaluation and analysis

  • mycroft-precise.test - Test a model against a dataset
  • mycroft-precise.test-pocketsphinx - Test PocketSphinx against a dataset
  • mycroft-precise.eval - Evaluate a list of models on a dataset
  • mycroft-precise.calc-threshold - Update the threshold values of a model for a dataset to make the sensitivity more accurate and linear
  • mycroft-precise.graph - Show ROC curves for a series of models
  • mycroft-precise.simulate - Simulate listening to long chunks of audio to find unbiased false positive metrics

Model conversion

  • mycroft-precise.convert - Convert wake-word model from Keras to TensorFlow

Details for Mycroft Precise

  • Apache-2.0

Last updated
  • 18 May 2020


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Where people are using Mycroft Precise

Users by distribution (log)

Ubuntu 22.04
Ubuntu 20.04
Ubuntu 23.04
Zorin OS 16

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