cmusphinx/sphinx4

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

1437 stars · 582 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Sphinx-4 is a speaker-independent, continuous speech recognition library written entirely in Java, originating from CMU and industry research labs. It runs on any platform with a JVM without native compilation and is released under a BSD-style license.

Use cases

• transcribe audio recordings to text in Java
• add offline voice command recognition to a desktop app
• build a speaker-independent speech recognizer on the JVM
• recognize continuous speech without cloud services
• experiment with speech recognition algorithms in research
• convert spoken audio from wav files into text

When to choose

• you need pure-Java, cross-platform speech recognition with no native dependencies
• you want fully offline recognition without sending audio to a cloud API
• you need an embeddable ASR library inside a JVM application

When to avoid

• you need state-of-the-art accuracy on noisy or large-vocabulary audio (modern deep-learning ASR is stronger)
• you are not on the JVM and cannot use Java
• you need active development or frequent updates

Facets

library · maturity maintenance

speech-recognition audio-processing machine-learning speech-processing machine-learning jvm cross-platform speech-recognition java offline-asr cmu-sphinx natural-language-processing

Member repositories

For agents

markdown · JSON · MCP: product_card(name="cmusphinx/sphinx4")