Mimic Recording Studio

The Mycroft open source Mimic technologies are Text-to-Speech engines which take a piece of written text and convert it into spoken audio. The latest generation of this technology, Mimic 2, uses machine learning techniques to create a model which can speak a specific language, sounding like the voice on which it was trained.

The Mimic Recording Studio simplifies the collection of training data from individuals, each of which can be used to produce a distinct voice for Mimic.

Software Quick Start

Windows self-hosted Quick Start

• git clone https://github.com/MycroftAI/mimic-recording-studio.git
• cd mimic-recording-studio
• start-windows.bat

Linux/Mac self-hosted Quick Start

Install Dependencies

• Docker (community edition is fine)
• Docker Compose Why docker? To make this super easy to set up and run cross platforms.

Build and Run

• git clone https://github.com/MycroftAI/mimic-recording-studio.git
• cd mimic-recording-studio
• docker-compose up to build and run Alternatively, you can build and run separately. docker-compose build then docker-compose up
• In browser, go to http://localhost:3000

Note: The first execution of docker-compose up will take a while as this command will also build the docker containers. Subsequent executions of docker-compose up should be quicker to boot.

Manual Install, Build and Start

Backend

Dependencies

• python 3.5 +
• ffmpeg

Build & Run

• cd backend/
• pip install -r requirements.txt
• python run.py

Frontend

Dependencies

• node & npm
• create-react-app
• yarn - optional for faster build, install, and start

Build & Run

• cd frontend/
• npm install, alternatively yarn install
• npm start, alternatively yarn start

Coming soon!

Online, http://mimic.mycroft.ai hosted version requiring zero setup.

Data

Audio Recordings

WAV files

Audio is saved as WAV files to the backend/audio_file/{uuid}/ directory. The backend automatically trims the beginning and ending silence for all WAV files using ffmpeg.

{uuid}-metadata.txt

Metadata is also saved to backend/audio_file/{uuid}/. This file maps the WAV file name to the phrase spoken. This along with the WAV files are what you needed to get started on training Mimic 2.

Corpus

For now, we have an English corpus, english_corpus.csv made available which can be found in backend/prompt/. To use your own corpus follow these steps.

1. Create a csv file in the same format as english_corpus.csv using tabs (\t) as the delimiter.
2. Add your corpus to the backend/prompt directory.
3. Change the CORPUS environment variable in docker-compose.yml to your corpus name.

IMPORTANT: For now, you must reset the sqlite database to use a new corpus. If you've recorded on another corpus and would like to save that data, you can simply rename your sqlite db found in backend/db/ to another name. The backend will detect that mimicstudio.db is not there and create a new one for you. You may continue recording data for your new corpus.

Technologies

Frontend

The web UI is built using Javascript and React and create-react-app as a scaffolding tool. Refer to CRA.md to find out more on how to use create-react-app.

Functions

• Record and play audio
• Generate audio visualization
• Calculate and display metrics

Backend

The web service is built using Python, Flask as the backend framework, gunicorn as a http webserver, and sqlite as the database.

Functions

• Process audio
• Serves corpus and metrics data
• Record info in database
• Record data to the file system

Docker

Docker is used to containerize both applications. By default, the frontend uses network port 3000 while the backend uses networking port 5000. You can configure these in the docker-compose.yml file.

Recording Tips

Creating a voice requires an achievable, but significant effort. An individual will need to record 15,000 - 20,000 phrases. In order to get the best possible Mimic voice, the recordings need to be clean and consistent. To that end, follow these recommendations:

• Record in a quiet environment with noise-dampening material. If your ears can hear outside noise, so can the microphone. For best results, even the sound of air conditioning blowing through a vent should be avoided. Bare walls create subtle echoes and reverberation. A sound dampening booth is ideal, but you can also create a homemade recording studio using soft materials such as acoustic foam in a closet. Comforters and mattresses can also be used effectively!
• Speak at a consistent volume and speed. Rushing through the phrases will only result in a lower quality voice.
• Use a quality microphone. To obtain consistent results, we recommend a headset microphone so your mouth is always the same distance from the mic.
• Avoid vocal fatigue. Record a maximum of 4 hours a day, taking a break every half hour.

Contributions

PR's are gladly accepted!