> ## Documentation Index
> Fetch the complete documentation index at: https://penseapp.vercel.app/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Text to Speech
> Learn how to evaluate and compare TTS providers with your data
[Calibrate](https://calibrate.artpark.ai) lets you evaluate multiple TTS providers simultaneously using your own text samples. This guide will walk you through creating an evaluation, managing reusable datasets, and sharing your results.
## Start a new evaluation
From the sidebar, click on **Text-to-Speech** to view all your evaluations and datasets. Click the **New evaluation** button to create a new evaluation.
## Add your dataset
On the **Dataset** tab, choose how to provide your text samples:
Create a new dataset inline. Give it a name, then add text samples in one of two ways:
1. **Add samples inline** — Type the text to synthesize in each row. Click **+ Add another row** to add more entries.
2. **Bulk upload via CSV** — Upload a CSV file with a `text` column:
```csv theme={null}
text
Hello, how can I help you today?
Your appointment is confirmed for tomorrow at 3 PM.
Thank you for calling. Have a great day!
```
Click **Download sample** to get a template with the correct format.
Your dataset is automatically saved so you can reuse it in future evaluations.
If you've already created a dataset, switch to **Use existing dataset** to pick from your saved datasets.
You can also create and manage datasets independently from the **Datasets**
tab. See [Datasets](/docs/core-concepts/text-to-speech#datasets) to learn how to
create reusable datasets and run evaluations directly from them.
## Configure settings
Switch to the **Settings** tab to select the language and the providers you want to compare:
Select a **Language** from the dropdown and check the providers you want to evaluate. Each provider shows the model and **Voice ID** it uses.
## Run evaluation
Click the **Evaluate** button at the top to start the evaluation. You'll be redirected to the results page where you can monitor progress in real-time.
## View results
### Outputs
The **Outputs** tab shows per-provider results. Select a provider from the list on the left to see its overall metrics and per-sample results.
Each sample row includes:
* **Text** — The input text you provided
* **Audio** — An inline audio player to listen to the generated speech
* **LLM Judge** — Pass/Fail based on audio quality evaluation
### Leaderboard
The **Leaderboard** tab shows a side-by-side comparison across all providers with aggregated metrics and bar charts.
## Sharing results publicly
Once your evaluation completes, you can make the results publicly accessible by clicking the **Share** button on the results page.
This toggles the evaluation to **Public** and generates a shareable link. Anyone with the link can view the leaderboard and outputs without needing a Calibrate account.
Click the **Public** button again to make the evaluation private.
## Next steps
Learn about TTS metrics — LLM Judge Score and TTFB
Save and reuse text samples across multiple evaluations
Run simulated conversations with your agent
Your dataset is automatically saved so you can reuse it in future evaluations.
## Add your dataset
On the **Dataset** tab, choose how to provide your text samples:
Select a **Language** from the dropdown and check the providers you want to evaluate. Each provider shows the model and **Voice ID** it uses.
## Run evaluation
Click the **Evaluate** button at the top to start the evaluation. You'll be redirected to the results page where you can monitor progress in real-time.
## View results
### Outputs
The **Outputs** tab shows per-provider results. Select a provider from the list on the left to see its overall metrics and per-sample results.
Each sample row includes:
* **Text** — The input text you provided
* **Audio** — An inline audio player to listen to the generated speech
* **LLM Judge** — Pass/Fail based on audio quality evaluation
### Leaderboard
The **Leaderboard** tab shows a side-by-side comparison across all providers with aggregated metrics and bar charts.
## Sharing results publicly
Once your evaluation completes, you can make the results publicly accessible by clicking the **Share** button on the results page.
This toggles the evaluation to **Public** and generates a shareable link. Anyone with the link can view the leaderboard and outputs without needing a Calibrate account.
Click the **Public** button again to make the evaluation private.
## Next steps