
CereProc - Detailed Review
Speech Tools

CereProc - Product Overview
CereProc Overview
CereProc is a pioneering company in the Speech Tools AI-driven product category, specializing in advanced text-to-speech (TTS) technology. Here’s a brief overview of what they offer:Primary Function
CereProc’s primary function is to provide high-quality, natural-sounding synthetic voices for various applications. Their TTS technology transforms text into speech, making it suitable for personal use, business applications, and assistive devices.Target Audience
CereProc’s solutions cater to a wide range of users, including individuals, businesses, and academic institutions. Their products are beneficial for anyone needing clear, expressive voice output, such as developers, content creators, and organizations looking to enhance user engagement and accessibility.Key Features
Natural and Customizable Voices
CereProc offers voices with character and personality, available in various accents like Southern British English, Scottish, and American. These voices are created using a custom deep-neural-network model, ensuring high-quality output.CereWave AI Voices
These voices can be used on multiple platforms and are known for their high quality and expressiveness.Voice Cloning
CereProc’s CereVoiceMe technology allows users to create a custom clone of their own voice using a web browser, providing personalized synthetic voices.Offline Use
The CerePlay app enables users to access CereWave AI voices offline on Android, iOS, and iPadOS devices.CereVoice Cloud
This service allows developers to integrate TTS capabilities into their applications via a web service or API, using a pay-per-character model.Server Solutions
CereProc offers server solutions that support multiple concurrent streams of speech synthesis, making them suitable for business needs.Developer Solutions
The CereVoice SDK allows developers to integrate TTS into any application, and it is free for academic institutions for research purposes.Conclusion
Overall, CereProc’s innovative TTS solutions are designed to bring content to life with clear, expressive, and natural-sounding voices, making them a valuable resource across various industries.
CereProc - User Interface and Experience
User Interface Overview
The user interface of CereProc’s speech tools, particularly their text-to-speech (TTS) software, is designed to be user-friendly and intuitive.Voice Selection and Customization
Users can easily select from a variety of voices using a dropdown menu in the panel above the editor or through the “Voices” menu item in the menu bar. This allows users to choose the desired language, accent, and specific voice.Speed and Loudness Adjustment
The interface includes sliders for adjusting the speed and loudness of the synthesized text. For speed, a value of 1.0 is the default, with higher values increasing the speed and lower values decreasing it. Similarly, the loudness can be adjusted with a slider, where 1.0 is the default, and values above or below this can make the audio louder or quieter, respectively.Emphasis and Emotion Tags
Users can add emphasis to specific words or phrases using the `Vocal Gestures
The interface also supports the insertion of non-verbal vocal gestures like laughter and coughing. Users can select these gestures from the menu bar under “Insert Tag” → “Vocal Gestures”.Ease of Use
The overall user experience is reported to be very positive. Users have found the software easy to install and use, with a basic installation process that involves downloading, selecting a default voice, and adjusting settings as needed. The feedback from customers indicates that the voices sound natural and lifelike, and the software is highly praised for its clarity and ease of use.Developer Interface
For developers, the CereVoice Engine SDK provides a simple yet powerful API across various platforms, including Windows, MacOS, iPhone OS, Linux, Raspberry Pi, and Android. This SDK allows developers to add TTS output to their applications with minimal code and includes features like pitch, speech rate, and pronunciation manipulation using SSML markup and CereVoice XML extensions.Summary
In summary, CereProc’s user interface is straightforward and easy to use, with clear options for voice selection, speed and loudness adjustment, and emotional synthesis control. The software is highly regarded for its natural-sounding voices and user-friendly setup process.
CereProc - Key Features and Functionality
CereProc Overview
CereProc, a leader in speech technology since 2005, offers a range of innovative text-to-speech (TTS) solutions that integrate advanced AI to enhance user engagement and accessibility. Here are the main features and functionalities of their AI-driven products:Natural and Customizable Voices
CereProc provides a wide range of natural, customizable voices across various languages. These voices are built using a custom deep-neural-network model, resulting in high-quality output that sounds expressive and realistic. This feature is particularly beneficial for businesses looking to create brand-specific voices that resonate with their audience.CereWave AI Voices
CereWave AI voices are a key offering from CereProc. These voices are created using advanced AI technology, ensuring they have real character and expressive qualities. These voices can be used on all available platforms, making them versatile for different applications.Voice Cloning
With CereVoiceMe, users can create a copy of their own voice from the comfort of their home using a web browser. This advanced TTS technology allows for the creation of personalized and high-quality synthetic voices, which can be useful for individuals and businesses alike.Offline Usage with CerePlay
The CerePlay app, available on the Google Play Store and Apple App Store, enables users to use CereWave AI voices offline on Android, iOS, and iPadOS devices. This feature is handy for situations where internet connectivity is limited or unreliable.CereVoice Cloud
The CereVoice Cloud API allows users to make speech synthesis requests remotely. This service operates on a pay-per-character model and can be accessed via the website or API, making it convenient for developers and businesses to integrate TTS into their applications.CereVoice SDK
The CereVoice SDK enables developers to integrate the CereVoice engine into any application. This can be purchased on an annual subscription and is free for academic purposes. The SDK provides the necessary tools for programmers to add high-quality TTS capabilities to their software.TTS Server
For business needs, CereProc offers a TTS server solution that allows for multiple concurrent streams of speech synthesis. This is ideal for meeting the demanding requirements of businesses that need reliable and scalable TTS solutions.Emphasis, Emotion, and Vocal Gestures Tags
CereProc’s TTS solutions include advanced tags for controlling the speech output. The emphasis tag allows for varying levels of emphasis on words, while emotion tags can change the emotional tone of the speech. Additionally, vocal gestures tags enable the insertion of non-verbal sounds like laughter and coughing, adding to the naturalness and character of the voices.Integration and Scalability
CereProc’s technology is easily embeddable and customizable, making it an ideal enhancement for various applications, including contact centers and customer experience workflows. The acquisition by Capacity further integrates CereProc’s technology into broader customer support and automation platforms, enhancing scalability and usability. These features collectively make CereProc’s TTS solutions highly versatile and effective for a wide range of applications, from personal use to business and assistive technologies. The integration of AI ensures that the voices are natural, expressive, and highly customizable, which is crucial for enhancing user engagement and accessibility.
CereProc - Performance and Accuracy
Evaluating the Performance and Accuracy of CereProc’s AI-Driven Speech Tools
Performance Improvements
CereProc has made significant strides in enhancing the performance of their synthetic speech technology, particularly with the release of CereWave AI Version 7. Here are some notable improvements:- Speed: The latest update has increased the generation speed of synthetic speech, making it faster even on lower-spec devices such as mobile phones and tablets.
- Prosody and Pronunciation: CereWave AI V7 includes improvements in prosody, with more accurate emphasis and speech rate, thanks to the integration of large language models (LLMs) for word embeddings. This enhances the natural intonation and pronunciation of the voices.
- Voice Cloning: The updated version of CereVoice Me allows for faster voice cloning using smaller amounts of data, without compromising the security of the voice data. This is achieved through AI-based adapter models that ensure ethical voice cloning practices.
Accuracy and Naturalness
CereProc’s text-to-speech technology is praised for its naturalness and expressiveness:- Human-Like Voices: CereWave AI generates speech that is nearly indistinguishable from human speech, with advanced machine learning technology that extracts the underlying structure of the voice and produces realistic speech waveforms.
- Language Adaptation: The technology can enable a voice to speak multiple languages without requiring extensive recordings in each language. For example, it allowed Dr. Peter Scott Morgan to speak French using his own voice without any French recordings.
- Emotional Styles: With the Voice Genre system, CereWave AI voices can seamlessly flow between different emotional styles, adding a layer of realism to the synthetic speech.
Limitations and Areas for Improvement
Despite these advancements, there are some limitations and areas where CereProc could improve:- Voice Quality Perception: Some users find the voices generated by CereProc to sound more robotic compared to other text-to-speech programs like Speechify. This can be a drawback for applications where a highly natural and human-like voice is crucial.
- Customization: While CereProc offers a range of voices and accents, some users feel that the customization options are limited compared to other platforms. For instance, users may not have as many options to change the tone or style of the voice to their liking.
- Educational Efforts: Although CereProc has started to educate the public about the capabilities and limitations of their AI technologies, there is still room for more extensive educational initiatives to raise awareness about the ethical use and potential misuse of synthetic voices.
Ethical Considerations
CereProc has a strong commitment to ethical innovation, which is evident in their practices:- Security Protocols: CereProc implements stringent protocols to prevent the misuse of their technology, such as prohibiting voice-based authentication for sensitive information and using watermarks to trace the origin of synthetic voices.
- Consent and Data Protection: The company ensures that all voices are crafted from legally obtained audio data and that consent is obtained from the original speakers before making any voices publicly available.

CereProc - Pricing and Plans
CereProc Pricing Overview
CereProc, an advanced text-to-speech technology, offers several pricing plans and options to cater to different user needs. Here’s a breakdown of their pricing structure and the features associated with each plan:
Pay-as-You-Go Plans
- This plan is ideal for users who do not require a high volume of text-to-speech conversions.
- The cost starts at £12.99 for 1 million characters of speech synthesis. Each character of speech synthesis is counted as one credit.
Monthly Subscriptions
- For users who need a higher volume of text-to-speech conversions, CereProc offers monthly subscriptions.
- These subscriptions start at £65 per month for 5 million characters, with higher tiers available such as £91 per month for 7 million characters and £156 per month for 12 million characters.
Annual Subscriptions
- Annual subscriptions are also available, offering a discounted rate compared to monthly payments.
- For example, the 5 million character plan costs £780 per year, the 7 million character plan costs £1092 per year, and the 12 million character plan costs £1872 per year.
Features Across Plans
- Voice Options: All plans provide access to a wide range of CereProc voices in multiple languages.
- Audio Formats: Users can generate audio in ogg, mp3, and wav formats at various frequencies (48kHz, 22kHz, 16kHz, and 8kHz).
- Custom Lexicons and Abbreviations: Support for user-specified custom lexicons and abbreviations is available.
- Metadata and Audio Output: Features include metadata for lip-syncing, animation, marker processing, and stereo and 3D audio output capability.
- Distribution Rights: Users are free to distribute the audio generated through the CereVoice Cloud without any additional licensing fees.
Free Options
- While CereProc does not offer a completely free service for general use, developers can gain free access to the CereVoice Cloud for testing and development purposes by creating a CereProc website account and registering for the CereCloud service. This free tier allows for limited usage and is primarily intended for developer testing.
Summary
In summary, CereProc’s pricing is structured around the volume of text-to-speech conversions needed, with both pay-as-you-go and subscription models available. The features are consistent across the plans, with the main difference being the volume of characters included.

CereProc - Integration and Compatibility
CereProc’s Speech Synthesis Technology
CereProc’s speech synthesis technology is highly versatile and integrates seamlessly with a variety of tools and platforms, making it a comprehensive solution for various needs.Platform Compatibility
CereProc voices are compatible with multiple operating systems, including:Microsoft Windows
- Microsoft Windows: Supported on Windows 8, Windows 8.1, Windows 10, and Windows 11. These voices are compatible with Microsoft SAPI 5 and appear in the Windows Text-to-Speech Control Panel.
Apple MacOS
- Apple MacOS: Compatible with MacOS versions from Mavericks to the latest versions, including Ventura and Sonoma, although there is a known issue with MacOS 13.3 that affects third-party voices.
Linux
- Linux: CereProc’s cServer, aimed at the corporate IVR market, can be run on Linux platforms.
iOS and Android
- iOS and Android: CereProc Mobile voices can be deployed on these mobile operating systems, and the CerePlay app allows for offline use of CereWave AI voices on these devices.
Integration with Applications
CereProc voices can be integrated into various applications using different methods:SDK and APIs
- SDK and APIs: The CereVoice Engine SDK allows developers to create applications incorporating CereProc’s text-to-speech functionality. This SDK supports multiple programming languages, including C/C , C#, Java, and Python, and can be used across Windows, Mac, Linux, iOS, and Android environments.
CereVoice Cloud
- CereVoice Cloud: This web service enables developers to incorporate CereProc’s text-to-speech technology into any internet-enabled application with just a few lines of code. It provides easy access to the CereVoice TTS engine and supports multiple programming languages.
Third-Party Software
- Third-Party Software: CereProc voices can be used with third-party applications such as Balabolka, Foxit PDF reader, NVDA (a free screen reader), and GhostReader (a MacOS type and speak app).
Deployment Options
CereProc offers various deployment options to suit different needs:On-Device
- On-Device: Voices can be installed directly on devices, including desktops, laptops, and mobile devices.
Cloud
- Cloud: The CereVoice Cloud allows for speech synthesis requests to be made remotely, using a pay-per-character model.
Server
- Server: CereProc cServers can be deployed on Windows and Linux platforms, offering high performance in multi-threaded, multi-channel environments.
Licensing and Use Cases
CereProc provides different licensing models to cater to various use cases:Commercial License
- Commercial License: Allows for use in commercial organizations and the redistribution of generated audio. This license includes a broadcast license for distributing speech in applications or presentations.
Personal License
- Personal License: For personal use only, not permitting commercial use or audio redistribution.
Academic Licensing
- Academic Licensing: The CereVoice Engine SDK is available free of charge to academic institutions for research purposes.

CereProc - Customer Support and Resources
Customer Support
Responsive Service
CereProc is known for its responsive customer service. Users have praised the company for its quick and helpful support. For example, several testimonials highlight the friendly and helpful nature of the CereProc customer service department.
Contact Options
While the main website does not provide detailed contact information specifically for support, users can likely reach out through general contact methods, such as the contact form or email, which are typically available on the company’s website.
Resources
Documentation and Guides
Documentation and Guides: Although the specific resources are not detailed on the provided links, it is common for companies like CereProc to offer comprehensive documentation, user guides, and FAQs to help users set up and use their TTS software effectively.
Tutorials and Demos
Tutorials and Demos: CereProc often provides demos and trial options on their main page, allowing users to test different voices and features before purchasing. This hands-on approach helps users understand the capabilities of the software.
Community and Forums
Community and Forums: While not explicitly mentioned, many companies in the TTS sector have community forums or support forums where users can ask questions, share experiences, and get help from other users and support staff.
Testimonials and Case Studies
Testimonials and Case Studies: The company shares testimonials from satisfied customers, which can serve as valuable resources for potential users looking to understand the real-world applications and benefits of CereProc’s TTS technology.
Additional Features and Tools
Voice Customization
Voice Customization: CereProc offers advanced features such as voice cloning, custom voice creation, and the ability to tweak voices for different pronunciations. These features are well-documented and supported through the software’s interface.
Integration Support
Integration Support: The software is compatible with various applications, including Microsoft C# APIs, making it easy for developers to integrate CereProc voices into their projects. Users have found the integration process to be straightforward and well-supported.
Overall, CereProc’s customer support and resources are geared towards providing a user-friendly experience, with a focus on quick responses and comprehensive support materials.

CereProc - Pros and Cons
Advantages
Natural and Expressive Voices
CereProc employs advanced algorithms, including its CereWave AI, to produce high-quality, natural-sounding voices. These voices are expressive and span over 20 languages with more than 50 accents and tones, making them versatile for various applications.Customization and Voice Cloning
CereProc offers the ability to create custom voices and even clone your own voice using its CereVoiceMe service. This feature is particularly useful for content creators, educators, and businesses looking for personalized voice solutions.Versatility in Applications
CereProc’s TTS technology can be integrated into various platforms, including websites, apps, and devices. It is suitable for a wide range of uses such as voiceover content, audiobook narration, e-learning, and more. The CereVoice Cloud API and SDK allow developers to incorporate TTS functionality easily.Offline Capability
The CerePlay app enables users to access CereWave AI voices offline on Android, iOS, and iPadOS devices, which is convenient for situations where internet connectivity is limited.Business and Personal Use
CereProc caters to both business and personal users, offering different pricing models. For personal use, the voices are more affordable, while commercial users can purchase voices for professional applications.Disadvantages
Robotic Voice Quality
Despite the advancements, many users find that CereProc’s voices sound more robotic compared to other TTS solutions like Speechify. This can be a significant drawback, especially for applications where a highly natural voice is crucial.Cost
While the personal use voices are relatively affordable, the commercial versions and custom voice creation services can be quite expensive. Each voice must be purchased separately, which can add up in cost.Limited Customization Options
Although CereProc offers customization, some users may find the options limited compared to other TTS tools. The voices, while natural, may not offer the same level of customization in terms of tone and style as some other platforms.User Feedback
Some users have expressed disappointment with the sound quality of CereProc’s voices, particularly if they are looking for a more human-like experience. This feedback suggests that while CereProc is improving, it may still not meet the expectations of all users. In summary, CereProc is a powerful TTS tool with advanced features and natural-sounding voices, but it may fall short in terms of voice quality and customization options for some users.
CereProc - Comparison with Competitors
Unique Features of CereProc
- Natural and Expressive Voices: CereProc is renowned for creating synthetic voices that are highly natural and expressive, incorporating emotion, character, and personality. This is achieved through its patented technology, including unit selection synthesis and parametric modelling.
- Voice Cloning: CereProc has advanced voice cloning capabilities, as seen in their work with individuals like Roger Ebert and Steve Gleason, who lost their ability to speak due to health conditions. This technology allows for the creation of synthetic voices that closely mimic the original voice.
- Customization and Regional Accents: CereProc offers a wide range of voices in over 24 languages and numerous regional accents, making it versatile for various applications, including education, healthcare, and creative arts.
- Compatibility: CereProc voices can be deployed on multiple platforms, including desktops, mobile devices, and servers, making them highly adaptable for different use cases.
Alternatives and Comparisons
Play.ht
- High-Fidelity Voices: Play.ht is known for its high-fidelity AI voices that are comparable to human voice talent. It is particularly useful for Hollywood studios and large enterprises, offering features like multi-speaker performances and editing capabilities.
- Ease of Use: Play.ht provides an API and an online rich-text editor, making it easy to scale and simplify voice work.
CereVoice Me
- Voice Cloning for All: This is a more accessible voice-cloning tool from CereProc itself, allowing users to create an electronic version of their voice with less recorded speech and at a lower cost. It is particularly useful for voice banking.
- Simplified Process: Unlike traditional voice creation processes, CereVoice Me simplifies the recording and post-production steps, making it more user-friendly.
CereWave AI
- Neural Text-to-Speech: CereWave AI uses advanced machine-learning technology to generate speech that sounds highly natural. It requires only 4 hours of recording to create a high-quality voice, compared to the 30 hours needed by traditional systems.
- Full Editing Control: This system allows for full editing and control over the voice, including changes in language, gender, or accent.
ReadSpeaker
- Lifelike Text-to-Speech: ReadSpeaker offers lifelike text-to-speech experiences, making it suitable for various applications such as website accessibility, IVRs, and public announcement systems. It allows users to create their own audio files using their text-to-speech voices.
- User-Centric Features: ReadSpeaker focuses on providing a better user experience while minimizing costs, catering to website visitors, mobile app users, and online learners.
ElevenLabs
- Developer-Friendly: ElevenLabs is a scalable text-to-speech solution with a focus on developer-friendly APIs. It simplifies the integration of text-to-speech capabilities into applications and services, offering clear and natural voice synthesis.
- Suitable for Various Applications: It is suitable for assistive technologies, content creation, and other applications where natural voice synthesis is crucial.
Murf AI
- Voice Symphony: Murf AI stands out for its ability to craft a voice symphony that redefines the auditory landscape. It offers a seamless fusion of technology and user-centric features, making it a strong alternative to CereProc.
- Versatile Applications: Murf AI is used in enhancing YouTube videos, podcasts, audiobooks, and other content, providing a high level of customization and naturalness in voice synthesis.
Conclusion
CereProc’s unique strengths in natural voice synthesis, voice cloning, and customization make it a leader in the text-to-speech industry. However, alternatives like Play.ht, CereVoice Me, CereWave AI, ReadSpeaker, ElevenLabs, and Murf AI offer different advantages and may be more suitable depending on specific needs, such as ease of use, cost-effectiveness, or specific application requirements. Each of these alternatives brings its own set of features and benefits, allowing users to choose the best fit for their particular use case.
CereProc - Frequently Asked Questions
Frequently Asked Questions about CereProc
Q: What is CereProc and what does it specialize in?
CereProc is a speech synthesis company based in Edinburgh, Scotland, founded in 2005. It specializes in creating natural and expressive-sounding text-to-speech voices, including voices with regional accents and voice cloning capabilities.Q: What voice-building technologies does CereProc use?
CereProc uses two main voice-building technologies: unit selection synthesis and parametric modelling. Unit selection synthesis involves segmenting recorded speech into individual units like phones, syllables, and words, and then selecting the best units to form the desired utterance. Parametric modelling uses statistical methods to model the frequency spectrum, fundamental frequency, and duration of speech, generating speech waveforms through a vocoder.Q: How does CereProc’s voice cloning service work?
CereProc offers a voice cloning service called CereVoice Me. This service allows users to record their own voice at home using a provided headset and mic. Users need to record 619 sentences, which typically takes 1.5 to 2 hours. The recorded voice can then be installed on Windows or macOS and used in various applications, including AAC (Augmentative and Alternative Communication) apps.Q: Can CereProc build a synthesis voice from existing recordings?
Yes, CereProc can build a synthesis voice from archive recordings. They require high-quality, preferably studio-quality recordings, and if available, transcriptions of the recordings. The recordings should be free of background noise and other interferences. CereProc reviews the data to determine if building a voice is possible.Q: What are the differences between CereProc and other text-to-speech programs like Speechify?
CereProc and Speechify differ in the naturalness and customizability of their voices. Speechify is known for its high-quality, natural-sounding voices with customizable features like pitch, volume, and tone. In contrast, CereProc’s voices can sometimes sound more robotic, although they are still highly advanced and suitable for various applications. CereProc’s voices are particularly noted for their regional accents and voice cloning capabilities.Q: How does CereProc’s CereVoice Cloud service work?
The CereVoice Cloud is a web service that allows developers to integrate CereProc’s text-to-speech technology into internet-enabled applications. Users can purchase cloud credits, which provide a certain number of characters of text input. For example, 1 million credits can synthesize around 14,000 typical SMS messages or 1,500 web articles, resulting in approximately 18 hours of audio output.Q: What are the licensing options for CereProc voices?
CereProc offers both commercial and personal use licenses. Commercial licenses are required for use in commercial organizations and for audio redistribution. These licenses include a broadcast license and allow unlimited audio distribution to end users. Personal use licenses are for individual users and do not permit commercial use or audio redistribution.Q: What file formats and system compatibility does CereProc support?
CereProc’s voices are compatible with Microsoft SAPI 5 on Windows and are supported on various versions of Windows and macOS. The voices are 48kHz for excellent clarity and naturalness, and the download size is around 100-150MB. They appear in the system voices list on both Windows and macOS.Q: How can I integrate CereProc voices into my applications?
CereProc provides software development kits (SDKs) and cloud services that allow developers to integrate text-to-speech functionality into their applications. With just a few lines of code, developers can generate speech output on CereProc’s cloud servers or use the voices locally on their systems.Q: Are CereProc voices available in multiple languages?
Yes, CereProc voices are available in several languages, including English, Spanish, French, Swedish, Italian, Polish, Romanian, and German. This makes their services versatile for a wide range of users and applications.