### Answer
To set up custom Text-to-Speech (TTS) with Azure for a non-English language using Vapi, you can follow these general steps, considering Vapi's integration capabilities with multiple TTS providers, including Azure:
1. **Sign Up for Azure**: You first need an Azure account. Create one if you haven't already and then access the Azure portal.
2. **Create a Speech Service Resource**: In the Azure portal, you'll need to create a new Speech service resource. This will give you access to the TTS capabilities.
3. **Get Your API Keys**: After setting up the Speech service, retrieve your API keys. These will be necessary for making authenticated requests to Azure's TTS.
4. **Set Up Your Vapi Assistant**:
- Log in to your Vapi dashboard.
- Create a new assistant or use an existing one.
- Configure your assistant to use Azure as the TTS provider by setting up the provider keys for Azure in the "Provider Keys" section of your dashboard.
5. **Customize TTS Settings**: Azure allows you to customize voices, speaking rates, and languages. Choose the appropriate voice that supports your desired non-English language.
6. **Integrate Azure TTS with Vapi**: Use the provider keys and Azure TTS settings to configure the TTS component of your Vapi assistant. This integration ensures that your voice assistant uses Azure’s TTS for generating voice outputs in the specified non-English language.
7. **Test Your Setup**: Make test calls or run simulations to ensure that the TTS is functioning correctly with your Vapi assistant in the chosen language.
For detailed steps and more specific configurations, refer to the Azure and Vapi documentation. Since the setup can vary based on the specific requirements and updates to the platforms, always ensure you're following the latest guidelines provided in the official documentation.
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