Voice Selection

The voice you choose significantly affects how contacts perceive your AI agent. hyzl provides a library of pre-built voices and the ability to clone your own.

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Voice library

The voice library contains a curated set of voices powered by leading text-to-speech providers (including ElevenLabs). Each voice has a name, gender, and sample you can play before choosing. To choose a voice:

1. Browse or search the library
2. Click a voice to hear a preview
3. Click Select to use it for your campaign

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Voice settings

Once you choose a voice, you can fine-tune its delivery: For most campaigns, the defaults work well. Adjust if the voice sounds robotic or inconsistent on test calls.

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Voice cloning

Voice cloning lets you create a custom voice from an audio recording. This is useful if you want the AI to sound like a specific person on your team.

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Requirements

• At least 30 seconds of clean audio (no background noise, music, or echo)
• Supported formats: MP3, WAV, M4A
• The speaker should use a natural, conversational tone

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Create a cloned voice

1. Go to Settings → Voices
2. Click Create Voice Clone
3. Upload your audio file
4. Give the voice a name

hyzl processes the clone in a few minutes. The voice then appears in the voice library. Your account includes up to 2 custom voice slots. Deleting a voice clone frees the slot for a new one.

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Language support

Voices are available in multiple languages. When choosing a voice, filter by language to find options that match your target audience. If you choose a non-English voice, the AI will respond in that language throughout the call.