White Paper

Developing future-proof Voice Interfaces

Our whitepaper shows how speech-controlled interfaces - and especially their output - can become more flexible and durable using established front-end development principles.

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#speech output
#future proof

Fast, accessible -

and fit for the future?

Talking instead of clicking: Voice interfaces (VI) are currently revolutionizing the way humans and machines interact. In the form of smart speakers or as an assistant in the car, they are already part of everyday life for many people. In contrast to graphical user interfaces, VIs can be operated more intuitively and offer a clear advantage in terms of speed and accessibility. But how must the code for voice-driven interfaces be designed so that they are not only practical, but that they are also scalable, modular, and sustainable?


Benefit from front-end development

If you want to develop a VI that is fit for the future, you should take a look at graphical user interfaces, despite the fundamental differences. More precisely: on the code behind them. After all, numerous architectural principles have become established in the field of frontend development, whose observance can make interfaces more flexible and thus increase maintainability. For example, the use of variables can reduce the manual effort, if adjustments are required in future. A helpful measurement that comes from the area of graphical interfaces, but can also be applied to VIs.

Voice output optimization

Architectural principles like this are already being used successfully in some areas of VI programming. For the improvement of the component of speech output, however, they have so far found little application, although these can bring great benefit. A central reason: The changeable features of speech output and graphical user interfaces differ significantly. Instead of color and size, dialect or tonality must now be adapted. This makes it difficult to transfer established principles. At this point our whitepaper starts and and takes up this challenge to make the advantages usable. It shows how the speech output of VI can nevertheless be optimized using best practices of frontend development.

Create flexible Voice Interfaces

Our whitepaper offers practical suggestions like this for the development of voice-controlled interfaces. Do you need further input or concrete support for your project? Our experts will be happy to help you. They have in-depth expertise in VI development and always pay attention to the flexibility and longevity of the interfaces.

Frank Reply


Frank Reply is the Reply Group company specializing in state-of-the-art technologies in Voice, Chatbots, Conversational AI, and Generative AI. As a strategy consultant and full-service provider, Frank Reply drives the development of the next generation of highly humanized and user-friendly speech interfaces. By architecting customized solutions, Frank Reply's experts empower international companies to maximize the output of their information- and communication-intensive customer processes throughout the entire customer journey. This not only effectuates a reduction in costs but also provides a better understanding of customer needs and a dramatic boost in customer satisfaction.