What is voice AI? A practical introduction

Voice AI is software that processes spoken input and produces a spoken response. A business assistant might explain approved information, ask clarifying questions or invoke a connected action. Its usefulness depends on the task and the surrounding system, not simply on how human the voice sounds.

How a conversation is produced

One architecture uses speech recognition, a language model and speech synthesis as separate stages. Another uses a realtime speech model that accepts and generates audio. Both need turn handling so the system can respond to pauses, corrections and interruptions. LiveKit's model documentation distinguishes the model choices used in these types of sessions.

Burki runs live sessions through LiveKit and defaults new assistants to GPT Live. Existing configurations may use a supported cascade. The actual combination must pass readiness checks.

What the assistant knows and can do

Instructions describe the job and boundaries. Approved business facts or a connected knowledge source provide context. Actions allow specific operations in other systems, such as requesting availability or creating a booking through a supported calendar connection.

Knowledge is not the same as permission. Telling an assistant that a business offers appointments does not grant access to a calendar. An answer that sounds confident is not evidence that a booking exists.

Voice, chat and phone menus

Text lets a customer inspect links and exact details at their own pace. Voice can be useful when a caller wants to explain a request aloud. A menu can remain effective for a small set of predictable choices. None is universally better; compare the actual task and provide an appropriate alternative when a caller cannot use the selected channel.

See voice versus chat and conversational AI versus IVR for decision worksheets.

How to evaluate it

Choose one task and write a test script with a known answer, a correction, an unknown question and an unavailable action. Review the resulting information and action evidence. Measure response timing consistently and inspect what the caller actually hears.

A browser conversation tests one channel. A telephone deployment adds the real carrier route, number configuration and any human handoff. Language support, recordings and regulated use also need their own checks.

What it costs

Costs can include platform usage, speech/model usage, telephone legs, number rental and optional storage or actions. Units vary by configuration. Compare total settled cost for a useful result, including staff review; do not assume a fixed savings percentage.

Start with a browser draft, then decide whether the measured result justifies connecting real callers.