> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zerotwo.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Voice Options

> Choose from 10 distinct AI voices for your ZeroTwo voice conversations, and understand audio format specifications.

ZeroTwo offers 10 AI voices with distinct tonal qualities and character. All 10 voices use the same underlying model and audio pipeline — the difference is in character, pacing, and style. Try a few to find what fits how you like to work.

***

## Available voices

| Voice       | Character                        | Best for                                                |
| ----------- | -------------------------------- | ------------------------------------------------------- |
| **Alloy**   | Balanced, neutral, versatile     | General use, professional contexts — a reliable default |
| **Ash**     | Warm, conversational             | Casual conversation, brainstorming, coaching            |
| **Ballad**  | Expressive, nuanced              | Creative work, storytelling, reading aloud              |
| **Cedar**   | Clear, professional, crisp       | Business tasks, presentations, formal writing           |
| **Coral**   | Friendly, approachable, upbeat   | Everyday Q\&A, learning, customer-facing use            |
| **Echo**    | Precise, sharp, technical        | Technical discussions, step-by-step guides, coding      |
| **Marin**   | Calm, smooth, measured           | Long sessions, focus work, ambient listening            |
| **Sage**    | Thoughtful, careful, wise        | Research, analysis, nuanced topics, advice              |
| **Shimmer** | Bright, energetic, lively        | Creative tasks, motivation, brainstorming               |
| **Verse**   | Natural, flowing, conversational | General use, dictation, note-taking, storytelling       |

<Tip>
  If you are unsure where to start, try **Alloy** for general use or **Coral** for a friendlier tone. Both are popular starting points and work well across a wide range of tasks.
</Tip>

***

## Voice descriptions in detail

<Accordion title="Alloy — Balanced and Neutral">
  Alloy is ZeroTwo's default voice for most users. It has a neutral, confident tone that works well across a wide range of tasks — technical questions, creative writing, casual chat, or professional discussions. If you are unsure which voice to pick, Alloy is a safe starting point.
</Accordion>

<Accordion title="Ash — Warm and Conversational">
  Ash has a warmer, more personal quality. It is well-suited for conversations where tone matters — coaching, brainstorming, or extended conversations where you want the AI to feel more like a collaborator than a tool.
</Accordion>

<Accordion title="Ballad — Expressive and Nuanced">
  Ballad has more dynamic, expressive vocal quality with natural variation in pacing and tone. It stands out when reading stories, working through creative projects, or any content where emotional range adds value.
</Accordion>

<Accordion title="Cedar — Clear and Professional">
  Cedar is precise and authoritative without being cold. It is ideal for business contexts: drafting emails out loud, summarizing reports, preparing talking points for presentations, or any task where a professional register matters.
</Accordion>

<Accordion title="Coral — Friendly and Approachable">
  Coral has an open, welcoming quality. It works well for everyday tasks, learning new topics, onboarding scenarios, or any situation where you want a non-intimidating conversational partner. Popular for lighter-tone use cases.
</Accordion>

<Accordion title="Echo — Precise and Technical">
  Echo prioritizes clarity and precision. It enunciates well and keeps a consistent pace, which makes it excellent for technical explanations, numbered steps, code walkthroughs, or any content where accuracy and following along matter most.
</Accordion>

<Accordion title="Marin — Calm and Smooth">
  Marin has a gentle, unhurried quality. It is ideal for long listening sessions — hearing lengthy documents read aloud, extended focus work sessions, or situations where a calmer, more measured energy is helpful.
</Accordion>

<Accordion title="Sage — Thoughtful and Careful">
  Sage speaks with deliberation and care. It suits topics that benefit from a reflective, considered tone: philosophy, research discussions, ethical questions, detailed analysis, or situations where you want the response to feel carefully weighed.
</Accordion>

<Accordion title="Shimmer — Bright and Energetic">
  Shimmer is upbeat and enthusiastic. It works well for motivational contexts, creative brainstorming sessions, generating ideas, or any workflow where a higher-energy voice keeps you engaged and moving.
</Accordion>

<Accordion title="Verse — Natural and Flowing">
  Verse sounds closest to a natural conversational cadence. It is great for dictation, note-taking, and general-purpose use where the voice should feel unobtrusive and easy to listen to for extended periods.
</Accordion>

***

## How to change your voice

<Steps>
  <Step title="Open Settings">
    Click your profile icon or navigate to **Settings** from the main menu.
  </Step>

  <Step title="Go to Preferences">
    Select the **Preferences** tab within Settings.
  </Step>

  <Step title="Find the Voice setting">
    Scroll to the **Voice** section. A dropdown shows all 10 available voices.
  </Step>

  <Step title="Select a voice">
    Click the dropdown and choose a voice. A short preview clip may play to help you decide.
  </Step>

  <Step title="Save">
    Your selection is saved automatically. The new voice applies to all future voice sessions.
  </Step>
</Steps>

<Note>
  Voice preference changes apply to **future voice sessions**. If you change your voice while a session is active, end the session and restart it to hear the new voice. Your preference syncs across all devices and browsers where you use ZeroTwo.
</Note>

***

## Audio technical specifications

All ZeroTwo voices use the same audio format optimized for real-time streaming:

| Property          | Value            |
| ----------------- | ---------------- |
| **Format**        | PCM16            |
| **Sample rate**   | 24 kHz           |
| **Channels**      | Mono             |
| **Delivery**      | WebRTC streaming |
| **Transcription** | Whisper-1        |

PCM16 at 24 kHz provides clear, intelligible speech with minimal latency. The mono channel is intentional — it reduces bandwidth requirements without meaningfully affecting voice quality for speech-based conversations.

***

## Network and quality notes

Voice quality depends on your network connection:

| Connection type                 | Expected quality                            |
| ------------------------------- | ------------------------------------------- |
| Strong WiFi or wired Ethernet   | Full quality, low latency                   |
| 4G/5G mobile connection         | Generally good, minor fluctuations possible |
| Weak or congested WiFi          | Increased latency, possible choppiness      |
| VPN (especially remote servers) | May add latency affecting real-time feel    |

<Note>
  If you notice voice quality degrading mid-session, it is almost always a network condition, not a ZeroTwo issue. Switching to a more stable connection resolves it in most cases.
</Note>

See [Voice Troubleshooting](/tools/voice/troubleshooting) for help with specific audio issues.