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CMU Sphinx VS Rhasspy

Compare CMU Sphinx VS Rhasspy and see what are their differences

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CMU Sphinx logo CMU Sphinx

CMU Sphinx is a speaker-independent large vocabulary continuous speech recognizer released under...

Rhasspy logo Rhasspy

Rhasspy transforms voice commands into JSON events that can trigger actions in home automation software.
  • CMU Sphinx Landing page
    Landing page //
    2022-12-17
  • Rhasspy Landing page
    Landing page //
    2023-02-12

CMU Sphinx features and specs

  • Open Source
    CMU Sphinx is free and open source, allowing developers to use, modify, and distribute the software without any licensing costs.
  • Offline Functionality
    CMU Sphinx can be used for offline speech recognition, making it suitable for applications where internet connectivity is unreliable or unavailable.
  • Flexible and Extensible
    CMU Sphinx provides a variety of tools and libraries that can be extended and customized for specific use cases, such as adapting it to recognize domain-specific vocabulary.
  • Multiple Language Support
    Supports various languages and accents, making it versatile for global applications.
  • Custom Models
    Allows the creation of custom acoustic and language models tailored to specific applications, thereby improving accuracy in specialized environments.

Possible disadvantages of CMU Sphinx

  • Accuracy
    CMU Sphinx often has lower recognition accuracy compared to more modern, deep learning-based speech recognition systems.
  • Complex Setup
    Setting up and configuring CMU Sphinx can be complex and requires a significant understanding of speech recognition technology.
  • Limited Community Support
    The user community and support for CMU Sphinx are not as large or active as those for some commercial or newer open-source alternatives.
  • Resource Intensive
    Running CMU Sphinx, especially with large custom models, can be resource-intensive, requiring significant CPU and memory resources.
  • Lagging Behind in Technology
    CMU Sphinx has not kept pace with recent advancements in speech recognition technology, particularly deep learning innovations employed by newer systems.

Rhasspy features and specs

  • Privacy-Focused
    Rhasspy processes voice data locally on the device, ensuring user privacy by not sending data to cloud services.
  • Customizability
    Users can customize intents and add new voice commands or modify existing ones according to their needs.
  • Open Source
    As an open-source project, Rhasspy allows users and developers to contribute to its development and modification.
  • Multilingual Support
    Rhasspy supports multiple languages, making it accessible to a wider range of users globally.

Possible disadvantages of Rhasspy

  • Complex Setup
    Initial setup can be complex for users unfamiliar with configuring software on local servers or Raspberry Pi.
  • Limited Third-Party Integration
    Compared to commercially available virtual assistants, Rhasspy has limited integration with third-party services.
  • Hardware Requirements
    Running Rhasspy locally may require specific hardware capabilities that are not available on all devices.
  • Community Support
    Being a community-driven project, support may vary and depend on the availability and engagement of community members.

Analysis of CMU Sphinx

Overall verdict

  • Yes, CMU Sphinx is a good choice for those seeking an adaptable and versatile speech recognition solution, particularly when an open-source option is preferred.

Why this product is good

  • CMU Sphinx is an open-source speech recognition system that is well-regarded for its flexibility and the broad range of features it offers. It supports several languages, is adaptable to various scenarios, and includes tools for acoustic model training. Its open-source nature allows developers to customize and modify the code to fit specific needs, which is valuable for educational and research purposes. Additionally, it has a strong community and a wealth of documentation and resources.

Recommended for

  • Research and educational purposes
  • Developers requiring a customizable speech recognition tool
  • Projects needing speech recognition in multiple languages
  • Users who prefer open-source software solutions

CMU Sphinx videos

+ Add

Training CMU Sphinx Speech Recognition

Rhasspy videos

+ Add

Overview of Rhasspy 2.5

More videos:

  • Demo - Rhasspy Voice Assistant Demonstration
  • Review - Episode 202: Add Intents to Rhasspy Offline Voice Assistant

Category Popularity

0-100% (relative to CMU Sphinx and Rhasspy)

CMU Sphinx

Rhasspy

Knowledge Sharing
45 45%
Knowledge Sharing
55% 55
Speech Recognition And Processing
68 68%
Speech Recognition And Processing
32% 32
Chatbots
0 0%
Chatbots
100% 100
Knowledge Search
40 40%
Knowledge Search
60% 60

User comments

Share your experience with using CMU Sphinx and Rhasspy. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, Rhasspy seems to be more popular. It has been mentiond 24 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

CMU Sphinx mentions (0)

We have not tracked any mentions of CMU Sphinx yet. Tracking of CMU Sphinx recommendations started around Mar 2021.

Rhasspy mentions (24)

  • The era of open voice assistants has arrived
    Yep, Mike Hansen was on the live stream launching the new device. He also notably created Rhasspy [1], which is open-source voice assistant software for Raspberry Pi (when connected to a microphone and speaker). [1] https://rhasspy.readthedocs.io/en/latest/. - Source: Hacker News / 6 months ago
  • Self Host personal Assistant ?
    Rhasspy seems promising and I started to tinker with it, but didn't get to a functional state before I got distracted by something else. Source: over 1 year ago
  • Alternatives to Google Assistant?
    Alternatively you could try using rhasspy under termux. Source: about 2 years ago
  • Best model to convert voice commands to JSON?
    Rhasspy might have a lot of what you're looking for: Https://rhasspy.readthedocs.io/en/latest/. Source: about 2 years ago
  • Consolidation advice
    There's many voice control options for HA, both private ones like Rhasspy and the corporate spyware ones that only an idiot would use. Source: over 2 years ago
View more

What are some alternatives?

When comparing CMU Sphinx and Rhasspy, you can also consider the following products

Express Dictate Digital Dictation Software - Express Dictate software is a voice recording program that works like a dictaphone.

Mycroft.AI - Mycroft is the world’s first open source assistant.

LipSurf - "Siri for Chrome" Completely control the browser without your hands -- say "google...

VoiceAttack - VoiceAttack will take commands that you speak into your microphone

TextFromToSpeech - Free online speech recognition tool that will help you write text with your voice without typing.

VoiceMacro - Control applications or games by voice commands and/or by the press of a keyboard, mouse button or...

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