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Voice Transformation – Marco Liuni, Alta Voce – Voice Tech Podcast ep.082

Marco Liuni Alta Voce

Episode description

Marco Liuni is the co-founder and audio miner at Alta Voce, a research-backed startup based in Paris, France that shapes the emotions in human and artificial voices to enhance communication.

Their product, Alta Call, is a voice transformation technology for contact centers, improving both the clarity of speech and enhancing the smile in the voice. Marco explains how their tech works, and we hear samples of audio that have been transformed.

We also cover some of the ethical issues of transforming human voice, and how they are tackling this in the product. Marco shares his advice for newcomers to the field of speech transformation, and some of his recommended reading.


  • A/B testing allows the call center and Alta Voce to measure the improvement in KPIs, and iterate on the product.
  • Emotion transformation results in less stress and fatigue for agents.
  • Voice is key to a person’s identity and must be respected.
  • Alta Voce strives to only enhance the emotions already in the voice; they don’t add new emotions.
  • Gaining consent and keeping users informed is critical when transforming the voice.

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About the author

Carl Robinson
Carl Robinson

Carl is the host of the Voice Tech Podcast. Since launching in April 2018, Carl has conducted scores of in-depth interviews with voice industry experts, building one of the most well known media brands in the voice AI space.

He also publishes Voice Chops Tuesday, the number 1 voice technology newsletter, enjoyed by thousands of voice tech fans each week.

Carl is a startup founder, product manager and data scientist, and recently presented a model for voice emotion conversion at ICASSP 2019.

To contact Carl, use the links in this box to send an email, tweet or message.

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