# Install cmuclmtk with Homebrew, MacPorts, zypper

Language model tools (from CMU Sphinx). Version 0.7 via Homebrew; verified 2026-06-19.

## Install

```sh
sudo av install brew:cmuclmtk
```

Additional install commands:

### macOS

- Homebrew (100%):

```sh
brew install cmuclmtk
```

  Evidence: local Homebrew formula metadata

- MacPorts (94%):

```sh
sudo port install cmuclmtk
```

  Evidence: MacPorts ports tree: audio/cmuclmtk/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1

### Linux

- zypper (92%):

```sh
sudo zypper install cmuclmtk
```

  Evidence: openSUSE Tumbleweed package metadata: cmuclmtk from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst

## Package facts

- **Package key:** brew:cmuclmtk
- **Package manager:** Homebrew
- **Package manager page:** <https://formulae.brew.sh/formula/cmuclmtk>
- **Version:** 0.7
- **Source summary:** Language model tools (from CMU Sphinx)
- **Homepage:** <https://cmusphinx.sourceforge.net/>
- **Repository:** <https://svn.code.sf.net/p/cmusphinx/code/trunk/cmuclmtk>
- **Upstream docs:** <https://cmusphinx.github.io/wiki/cmuclmtkdevelopment>
- **License:** BSD-2-Clause
- **Source archive:** <https://downloads.sourceforge.net/project/cmusphinx/cmuclmtk/0.7/cmuclmtk-0.7.tar.gz>
- **Last updated:** 2026-06-19T12:30:04-07:00
- **Generated:** 2026-07-08T18:08:21+00:00

## Executables

- evallm (cli)
- idngram2lm (cli)
- idngram2stats (cli)
- lm_combine (cli)
- lm_interpolate (cli)
- mergeidngram (cli)
- ngram2mgram (cli)
- text2idngram (cli)
- text2wfreq (cli)
- text2wngram (cli)
- wfreq2vocab (cli)
- wngram2idngram (cli)
- evallm (alias)
- idngram2lm (alias)
- idngram2stats (alias)
- lm_combine (alias)
- lm_interpolate (alias)
- mergeidngram (alias)
- ngram2mgram (alias)
- text2idngram (alias)
- text2wfreq (alias)
- text2wngram (alias)
- wfreq2vocab (alias)
- wngram2idngram (alias)

## Build dependencies

- pkgconf

## Install behavior

- Post-install hook: not defined
- Bottle: available on arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, catalina, monterey, sonoma, ventura

## Freshness

- Page generated: 2026-07-08
- Package-manager version: 0.7
- Package-manager updated: 2026-06-19
- Local data: ok
- Upstream repository: https://cmusphinx.sourceforge.net/
- info: Release/tag comparison is only available for GitHub repositories.
## Project history and usage

CMUCLMTK is the CMU-Cambridge statistical language modeling toolkit as carried in the CMUSphinx tree: a set of Unix-style tools for building word-frequency lists, vocabularies, n-gram counts, and backoff bigram/trigram language models for speech-recognition workflows.

### Project history

Roni Rosenfeld released version 1 of the CMU Statistical Language Modeling Toolkit in 1994, and Philip Clarkson and Rosenfeld published the CMU-Cambridge toolkit paper in 1997 describing version 2. CMUSphinx later kept the toolkit in its Subversion tree, with CMUSphinx documentation noting that no official toolkit release had appeared since the Cambridge release and that a planned CMUSphinx release would effectively be version 2.1.

### Adoption history

The 1997 paper reported use in more than 40 academic, government, and industrial laboratories in more than 12 countries. In package-manager culture it survives as a niche speech/NLP utility: this batch input records Homebrew, MacPorts, and openSUSE/zypper package names.

### How it is used

Typical use is a pipeline of small commands such as text2wfreq, wfreq2vocab, text2idngram, idngram2lm, evallm, lm_combine, and lm_interpolate to turn text corpora into n-gram language models and evaluate or combine them.

### Why package nerds care

Package nerds care because it is a fossilized but useful research-toolchain package: old speech-recognition infrastructure, many tiny command-line filters, and CMUSphinx lineage preserved in modern package managers long after the research ecosystem moved toward newer language-modeling tools.

### Timeline

- 1994: Version 1 of the CMU SLM Toolkit was released.
- 1997: Clarkson and Rosenfeld published the CMU-Cambridge toolkit paper for version 2.
- CMUSphinx era: The toolkit was maintained under the CMUSphinx Subversion tree with planned version 2.1 work.

### Related projects

- CMUSphinx and PocketSphinx are the speech-recognition projects around which this toolkit is distributed.
- SRILM is a later, widely cited language-modeling toolkit in the same n-gram research-tooling family.

### Sources

- <https://www.cs.cmu.edu/~dorcas/toolkit_documentation.html>
- <https://www.isca-archive.org/eurospeech_1997/clarkson97_eurospeech.html>
- <https://cmusphinx.github.io/wiki/cmuclmtkdevelopment>


## Security Notes

narrow executable package without higher-risk signals.

- **Geiger risk:** green / low
- narrow executable package without higher-risk signals

## Source Database Details

- **Source Database:** Homebrew formula API
- **Tap:** homebrew/core
- **Full Name:** cmuclmtk
- **Version Scheme:** 0
- **Revision:** 0
- **Conflicts With:** julius
- **Bottle Stable Root URL:** <https://ghcr.io/v2/homebrew/core>
- **Deprecated:** no
- **Disabled:** no
- **Keg Only:** no
- **URL Keys:** stable

## Other Package-Manager Records

- zypper - cmuclmtk - 0.7-12.5: normalized package name match | openSUSE Tumbleweed package metadata: cmuclmtk from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst | CMU-Cambridge Statistical Language Modeling toolkit | http://cmusphinx.sourceforge.net
- zypper - libcmuclmtk-devel - 0.7-12.5: normalized package name match | openSUSE Tumbleweed package metadata: libcmuclmtk-devel from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst | CMU-Cambridge Statistical Language Modeling toolkit | http://cmusphinx.sourceforge.net
- zypper - libcmuclmtk0 - 0.7-12.5: normalized package name match | openSUSE Tumbleweed package metadata: libcmuclmtk0 from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst | CMU-Cambridge Statistical Language Modeling toolkit | http://cmusphinx.sourceforge.net
- MacPorts - cmuclmtk: normalized package name match | MacPorts ports tree: audio/cmuclmtk/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1


## Related links

- [Terminal utility packages](https://www.automicvault.com/pkg/terminal-utilities/) - Matched terminal and command-line workflow metadata.
- [Language runtime packages](https://www.automicvault.com/pkg/language-runtime-packages/) - Matched language runtime, compiler, or interpreter metadata.
- [Networking and protocol packages](https://www.automicvault.com/pkg/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata.
- [Media and graphics packages](https://www.automicvault.com/pkg/media-graphics-tools/) - Matched media, image, audio, video, or graphics metadata.
- [pkgconf](https://www.automicvault.com/pkg/brew/pkgconf/) - Build dependency declared by Homebrew.
- [cmu-pocketsphinx](https://www.automicvault.com/pkg/brew/cmu-pocketsphinx/) - Shares av.db curated category or tags: cli, cmusphinx, media, speech-recognition.
- [julius](https://www.automicvault.com/pkg/brew/julius/) - Shares av.db curated category or tags: cli, media, speech-recognition.
- [openai-whisper](https://www.automicvault.com/pkg/brew/openai-whisper/) - Shares av.db curated category or tags: cli, media, speech-recognition.
- [whisper-cpp](https://www.automicvault.com/pkg/brew/whisper-cpp/) - Shares av.db curated category or tags: cli, media, speech-recognition.
- [whisperkit-cli](https://www.automicvault.com/pkg/brew/whisperkit-cli/) - Shares av.db curated category or tags: cli, media, speech-recognition.
- [tsduck](https://www.automicvault.com/pkg/brew/tsduck/) - Shares av.db curated category or tags: cli, media, toolkit.
- [yap](https://www.automicvault.com/pkg/brew/yap/) - Shares av.db curated category or tags: cli, media, speech-recognition.
- [a52dec](https://www.automicvault.com/pkg/brew/a52dec/) - Shares av.db curated category or tags: cli, media.

## Combined YAML source

View the package source record on GitHub. [combined/cmuclmtk.yml](https://github.com/automic-vault/db/blob/main/combined/cmuclmtk.yml)


## Sources

- Nucleus package database
- Geiger risk classifier
- package-page enrichment
- curated package history
- package version freshness
- av.db category and tag curation
- package relationship graph
- external package-manager database matches
- cross-ecosystem install command graph