How to test your voice AI agent

Josh York, Christopher Zheng, Angela Park

Published: Nov 04, 2025

The voice that answers your phone is the voice of your brand. When a caller picks up the line, that first greeting sets the tone for the entire interaction. A friendly, clear, and confident voice instils trust and communicates professionalism.

Before your AI agent ever speaks with a customer, you can now test its voice directly inside the Syllable Console. The new Voice Test feature lets you listen, adjust, and compare voices instantly — all without running a live session.

With Voice Preview, you can confirm your tone, pronunciation, and pacing before launch.

How it works

• Go to your Agent in the Syllable Console, click on "Agents", select the agent you'd like to hear and click "Preview"
• Start your test under "Test your agent", click "Start"
• Listen and adjust — instantly hear your agent's voice and listen to its tone, pronunciation and pacing
• Verify tool calls — watch the panel on the right hand side for tool usage and other technical information
• Perfect the voice — change the voice or adjust the talking speed under "Voices"

Voice Preview makes it easy to

• Preview voice quality without running full sessions
• Ensure pronunciation accuracy for brand names or complex terms
• Compare voice providers like Google Chirp, OpenAI, ElevenLabs
• Save time during onboarding and QA

Combined with Pronunciations and Voice Groups, Syllable offers you full control over how your agents sound in every language and across every channel.

Build AI agents that represent your brand

Voice Preview is part of Syllable's mission to optimize AI agents for clarity, consistency, and trust across voice, chat, and web. Try it out in the Syllable Console today.