Nuance Vocalizer is the leading speech output solution converting any written text into spoken output. Vocalizer advances the state of the art in automated speech output. Along with the ability to gracefully blend static and dynamic speech output, Vocalizer features enhanced speech quality and accuracy through optimized text processing, more comprehensive pronunciation dictionaries, and, in many languages, complete voice refreshes. It is fully interoperable with Nuance Speech Server and Nuance Recognizer products.

Nuance Vocalizer is the complete spoken output engine that can be integrated with any Unified Communication System or Telephony Environment that supports MRCP. It automates more calls by speaking information that would otherwise have required transferring the call to a customer service representative to read. Applications send text to Vocalizer and it determines whether to use pre-recorded prompts, dynamically generated speech, or a combination of the two. Nuance Vocalizer avoids patchwork prompts by blending high quality text-to-speech with pre-recorded audio for seamless conversations with callers.

Automating More Calls

Research has shown that callers are more likely to complete an automated call when they hear information such as names and addresses read clearly by a single voice. Callers who hear “patchwork prompts” of multiple voices with poorer quality text-to-speech are distracted by the mixed voices and are more likely to opt-out of automation. With Nuance Vocalizer, quickly speak information to callers that would otherwise require agent handling.

Lower Implementation and Operational Costs

Simplify application development by managing recorded prompts and computer-generated speech through one unified interface. Avoid expensive voice talent with lifelike speech synthesis based on recurrent neural networks.

Vocalizer Studio. A suite of tools for Vocalizer 7.

Vocalizer Studio is a suite of easy-to-use graphical tools that provides unprecedented control over speech output. Monitor and evaluate the output of Vocalizer 7 with Quick Evaluator; adjust the way input text is treated with Rule Set Editor and User Dictionary Editor; fine tune speech output with PromptSculptor, a powerful interface for customizing expressivity and for blending TTS with recorded speech.

Vocalizer Studio is designed as a set of plug-ins that can be used separately or together in a tabbed suite. This modular architecture is designed for flexibility and will allow Vocalizer Studio to evolve along with advances in Vocalizer 7 TTS technology.

Vocalizer Studio for tuning purposes is included with the purchase of any Vocalizer 7 runtime license. An annual or perpetual Vocalizer Offline license allows users to create offline prompts for IVR and telephony applications.

Hear the Difference with Vocalizer

  • Advanced syntactic analysis for better modeling of prosody, emphasis and intonation
  • Newest voice building techniques incorporating expressive recordings
  • over 100 voices and 50 languages
  • Extend morphosyntactical analysis across more languages
  • Add stronger NLU capabilities
  • Increase the support to a deeper text preprocessing for reading news, email, etc
  • Additional higher quality and multilingual voices
  • Gilded speech for higher naturalness


Try Vocalizer 6 yourself with this demo.

A sampling of Vocalizer Voices

English (US)
Zoe (V7)







Nuance Vocalizer Availability Notice

This document provides the availability status, support status, and transition dates for Nuance Vocalizer. “On or After” indicates an earliest possible transition date when a specific date has not yet been established. Nuance product availability and support policy, including relevant terms, are defined in the governing license agreement. Exceptions to this policy, including the availability or support stated herein, must be granted in writing by Nuance via Diagenix.

High-quality, humanlike voices
Ready for Cloud
Available in more than 50 Languages and 115 Voices, 17 of Which are Multilingual
Name and Address Optimization
Highly Tunable and Customizable
Enhanced Expressivity
Improved Multilingial Support
High Quality Speech Output
Lower Implementation and Operational Costs
Easy to Use
Standards Support (SSML, VXML, and MRCPv2)
AMRCPv1 and MRCPv2 Support
Operates on all Standard Operating Systems
Nuance Vocalizer 7 Data Sheet
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Nuance Vocalizer 7 Language and Voice Availability
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Vocalizer Studio: Tuning Tools for Vocalizer 7
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Nuance Vocalizer 6 Data Sheet
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Nuance Vocalizer 6 Language Availability
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Tech Notes: Vocalizer 6 New Features & Changes
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Nuance Vocalizer Availability Notice
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