Why This Matters
Most voice-quality problems are not caused by one bad setting. They usually come from the interaction between:- how accurately the caller is transcribed
- how quickly the model decides what to say
- how natural the chosen voice sounds
- how the system handles pauses, interruptions, and pronunciation
The Five Parts Of The AI Pipeline
| Part | What it controls | Main doc |
|---|---|---|
| Transcriber | How caller audio becomes text | Transcriber |
| AI model | How the agent reasons and responds | Choose AI Model |
| Voice | How the response sounds to the caller | Select Voice |
| Voice behavior | Speed, stability, style, and pronunciation | Voice Settings and Custom Pronunciations |
| Timing | Interruptions, pauses, silence, and turn-taking feel | Turn-Taking and Timing |
Start With The Outcome You Need
Choose the pipeline configuration based on the actual conversation you are deploying.Fast phone support or triage
Fast phone support or triage
Prioritize low latency, clear pronunciation, and interruption handling.Start with:
- a fast transcriber
- a clear, neutral voice
- conservative turn-taking tuning
- minimal ambient effects
Brand-sensitive concierge or sales experience
Brand-sensitive concierge or sales experience
Prioritize warmth, brand fit, and consistent pacing.Start with:
- a voice that matches your tone and audience
- stronger voice prompting
- pronunciation rules for product and company names
- test calls with realistic objections and interruptions
Multilingual or regional deployment
Multilingual or regional deployment
Prioritize language coverage and locale accuracy.Start with:
- language support in the transcriber
- locale-matched voices in Select Voice
- test scripts for each target language
- explicit prompt instructions if tone or phrasing changes by region
Compliance-sensitive or privacy-sensitive workflows
Compliance-sensitive or privacy-sensitive workflows
Prioritize clarity, consent, and predictable behavior.Start with:
- short, direct voices with minimal embellishment
- clear announcements
- explicit privacy controls
- conservative timing settings so callers can interrupt easily
Configuration Order
Work through the pipeline in this order. Each layer depends on the one before it.| Step | What to configure | Why first |
|---|---|---|
| 1. Transcriber | Language, provider, model | If the caller is misheard, nothing downstream can recover |
| 2. Voice | Provider, voice, cloning | Pick what callers hear once transcription is solid |
| 3. Voice refinements | Settings, pronunciations, ambient sound, thinking sounds | Fine-tune after the core voice is chosen |
| 4. Timing | Turn-taking, silence, interruptions | Tune last — timing sliders can mask deeper problems |
- Transcriber — provider and language breakdown
- Select Voice — catalog and provider guidance
- Voice Settings, Custom Pronunciations, Ambient Sound, Thinking Sounds
- Turn-Taking and Timing
Common Symptoms And Where To Look First
| Symptom | First place to look | Then check |
|---|---|---|
| Agent mishears names, addresses, or numbers | Transcriber | Custom Pronunciations |
| Voice sounds wrong for the brand | Select Voice | Prompt Engineering Guide |
| Speech sounds robotic or uneven | Voice Settings | Select Voice |
| Agent cuts callers off | Turn-Taking and Timing | Transcriber |
| Agent feels slow after the caller stops talking | Turn-Taking and Timing | Choose AI Model |
| Product names or company names are spoken badly | Custom Pronunciations | Prompt Engineering Guide |
| Cloned voice sounds inconsistent | Voice Cloning | Voice Settings |
A Practical Rollout Sequence
Prove the logic in chat
Confirm the prompt, tools, and knowledge work before you spend time on voice tuning.
Evaluate the voice in Web Call
Listen for pace, pronunciation, and interruption feel in the browser.
Validate the full call on the phone
Run at least one real phone call. Phone audio and network behavior often change the result.
Common Mistakes
Choosing the prettiest voice before checking transcription
Choosing the prettiest voice before checking transcription
A beautiful voice does not help if the caller is transcribed inaccurately. Start with recognition quality, then optimize style.
Trying to fix slow responses with ambient sound
Trying to fix slow responses with ambient sound
Ambient sound can improve feel, but it does not solve slow model responses, slow tools, or high-latency transcription.
Testing only with your own voice and accent
Testing only with your own voice and accent
Always test with the kinds of callers you actually expect: different accents, speeds, noise levels, and interruption patterns.
Changing multiple layers at once
Changing multiple layers at once
If you change the transcriber, voice, prompt, and timing together, you will not know what actually improved or broke the conversation.
Next Steps
Select Voice
Browse, preview, and choose the voice your callers hear
Transcriber
Pick the speech-to-text layer that fits your languages and latency needs
Voice Cloning
Create and evaluate custom branded voices
Turn-Taking and Timing
Tune pauses, interruptions, and silence handling