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

# Background music won't generate even though I have credits

If you see a 'Usage limit exceeded' message while you still have credits, this isn't a system error. It's a **normal limit based on the background music (BGM) generation policy**.

### Background music model update

Carat upgraded its background music generation model to deliver higher-quality audio. As a result, the computing resources and credits needed to generate a single track have increased significantly compared to before.

### Generation limit for free users

With the total daily credits provided to free users, you can currently generate only about **22 seconds** of high-quality background music at most.

### Why generation fails even with credits

Carat's credits are also partially consumed when you chat with the AI agent or use other features.

Because background music generation requires a large amount of credits at once, the system may block it if your credits have already dropped (for example, from conversation) below what's needed to fully generate one track.

### How to resolve it

* **Shorten the music length:** Set the requested music to a very short length and try again.
* **Upgrade your subscription plan:** If you'd like to generate longer, high-quality music without restrictions, we recommend upgrading to a [subscription plan](https://carat.im/en/upgrade).