December 16, 2020

Accenture and CereProc Introduce and Open Source the World’s First Comprehensive Non-Binary Voice Solution

NEW YORK and EDINBURGH, Scotland; Dec. 16, 2020 – Accenture (NYSE: ACN) collaborated with CereProc, a text-to-speech technology provider, to create Sam, the world’s first comprehensive non-binary voice solution for the fast-growing global digital assistant market. To encourage adoption, the companies have released all the materials used to generate the voice to the Open Source community.

This year, consumers interacted with 4.2 billion digital voice assistants around the world, and that number is expected to double to 8.4 billion devices by 2024, according to a report by Juniper Research. The vast majority of today’s device voices are female, or female by default, and this limited diversity is problematic. A 2019 UNESCO report found that designing female-only voice assistants reinforces gender bias and encourages negative behavior, both with digital assistants and with real people. Additionally, voices available today are binary and do not reflect the transgender or gender non-conforming community, which represents 12% of millennials.

To help address these issues, researchers at Accenture Labs worked closely with members of the non-binary community on the development of Sam’s voice. Accenture surveyed non-binary individuals and used their feedback and audio data to influence not only pitch, but speech patterns, intonation, and word choice. CereProc then created the text-to-speech model using its artificial intelligence (AI) technology. The result is a voice that combines aspects of male and female voices to better resonate with the community it was designed to represent.

Audio sample of Sam voice

“While gender-neutral voice samples have been released previously, Sam is the first non-binary AI-based digital voice solution that can be embedded into any software solution to speak text in a human-sounding voice,” said Marc Carrel-Billiard, senior managing director and Technology Innovation lead at Accenture. “This work is a great example of how technology and human creativity can come together and spark a moment of societal change that can benefit many people. We believe it’s essential that voice assistants more accurately represent the diversity of our global population.”

Accenture has open-sourced all components necessary to develop a non-binary voice assistant—including a version of the text-to-speech voice running on an open-source engine, along with voice-training data to encourage broader adoption. Accenture is also working with researchers at Heriot-Watt University who will use the voice as part of a collaborative research effort with several other universities focused on designing conversational assistants to reduce gender bias.

Paul Welham, chief executive officer of CereProc, added, “By creating a non-binary voice with Accenture, CereProc is challenging strongly held mainstream views in IT that a synthetic voice has to be clearly male or female. One of CereProc’s key aims since inception has been to empower application designers to disrupt the status quo in speech; with this non-binary voice we wish to raise awareness of this important issue in the next generation of AI-based digital voice systems that are developed.”

About Accenture
Accenture is a global professional services company with leading capabilities in digital, cloud and security. Combining unmatched experience and specialized skills across more than 40 industries, we offer Strategy and Consulting, Interactive, Technology and Operations services — all powered by the world’s largest network of Advanced Technology and Intelligent Operations centers. Our 506,000 people deliver on the promise of technology and human ingenuity every day, serving clients in more than 120 countries. We embrace the power of change to create value and shared success for our clients, people, shareholders, partners and communities. Visit us at

About CereProc
CereProc, founded in 2005, creates text-to-speech solutions for any type of application. Its core product, CereVoice, is a fast, cost-effective voice creation engine and is available on any platform, from mobile and embedded devices to desktops and servers. CereProc voices have character, making them appropriate for a far wider range of applications than traditional text-to-speech systems, including the innovative Hanson Robotics singing synthesis project. Developed by a team of speech synthesis experts, and widely regarded as the most advanced in the world, CereProc voices are changing the lives of people around the world. The company continues to innovative, supporting individuals and businesses with their Text-to-Speech needs. Visit us at:

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Hannah Unkefer
+1 206 839 2172

Sophie Riewoldt
CereProc Ltd
+44 131 516 8532

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