Developers
Loudness.ai for developers
Open-source tools for audio and speech that run on your own computer, server or web page: SDKs, free browser demos, step-by-step guides and open data. No account or API key.
SDKs
Free, open source and local. Each SDK has its own page with installation, examples and links.
AI Noise Remover SDK
Remove background noise from voice recordings, enhance speech, normalize loudness, convert and measure audio, from Python, JavaScript or the command line.
pip install loudness-audio-kitloudness-tts
Natural text to speech in Python and JavaScript: 1,683 ranked voices in 31 locales, numbers and dates read as words, word timings, subtitles and an OpenAI-compatible server.
pip install loudness-ttsTry in your browser
Free demos on Hugging Face that run the SDKs inside your browser. Nothing is uploaded.
AI Noise Remover & Loudness Normalizer
Remove noise from speech and set its loudness to a LUFS target.
Free Text to Speech in Your Browser
Type text and hear it in a natural voice, with word highlighting and subtitles.
Piper Voice Explorer
Listen to and compare every ranked voice, with its scores and licence.
Guides
Step-by-step instructions for installing the SDKs and connecting them to the apps you use.
- Install the AI Noise Remover SDKPython and FFmpeg on Windows, macOS and Linux, your first noise removal and the JavaScript build.
- Install loudness-ttsPython or JavaScript on Windows, macOS and Linux, first speech with subtitles, the speech server, Docker and offline use.
- Free local text to speech for Open WebUIRead Open WebUI answers aloud with natural voices that run on your own machine.
- Free local text to speech for LibreChatConfigure librechat.yaml so LibreChat reads messages aloud with free local voices.
- Free local text to speech for AnythingLLMUse AnythingLLM’s OpenAI Compatible provider with free voices on your own machine.
Open data and research
The studies behind our SDKs, with their data, so you can check and reuse the results.
Open Piper TTS Voices Ranked
Naturalness, clarity and licences of 1,683 open voices.
Teaching Piper TTS to Read
Text normalization and word timings, measured.
Voice ranking dataset on Hugging Face
Scores, licences and a sample of every voice.
Browser extensions
Loudness.ai tools that work inside Google Chrome, starting with Volume Booster.