Telnyx Ultra Voices Now Sound More Natural on Voice AI Assistants
11, May 2026
Telnyx Ultra voices on Voice AI Assistants now deliver more natural, expressive speech with cleaner audio, context-aware pronunciation, and alphanumeric handling that works out of the box across every supported language.
What's new
Expressive pacing and emotional range: Conversational and support-style transcripts produce speech with natural rhythm and emotional expression, so agents sound present rather than flat.
Clean audio across all languages: Artifact removal and quality improvements apply to every supported language and voice.
Natural alphanumeric handling: Confirmation codes, order numbers, phone numbers, IDs, and email addresses read naturally without preprocessing, in every supported language.
Context-aware English pronunciation: Heteronyms like "read," "bass," and "bow" resolve correctly based on surrounding text, with no workaround dictionaries needed.
Why it matters
Synthetic voices that mispronounce confirmation codes or read email addresses character by character break caller trust and force custom normalization logic. Ultra voices handle alphanumerics natively, so you can remove that preprocessing code.
Flat, monotonous pacing makes AI agents sound disengaged. Expressive delivery keeps callers in the conversation longer.
Heteronym errors in English ("I will read the record" vs. "keep a record") cause confusion in support and sales calls. Context-aware resolution prevents those mistakes without per-word overrides.
Every improvement applies across all supported languages, so global deployments work without per-language tuning.
Example use cases
Support agents reading confirmation codes and order numbers to callers without stilted or robotic delivery.
Sales assistants handling product names, email addresses, and account IDs in a single natural sentence.
Multilingual contact centers deploying the same voice quality across all regions without extra configuration.
Getting started
In Mission Control, navigate to AI → Assistants and select your assistant.
Go to the Voice tab and select a Telnyx Ultra voice as your TTS provider.
Place a test call to validate the new delivery quality.
