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

# Custom voices

> Upload approved samples, create reusable voices, and keep a consistent voice identity across projects.

# Custom voices

Custom voices let you upload your own approved speech samples and reuse that voice across many projects.

## When custom voices are useful

* recurring narration
* branded voiceovers
* a founder or team voice used across many videos
* channel consistency across multilingual publishing

## File requirements

VoiceCheap currently accepts these audio formats for custom voice uploads:

* `aac`
* `ac3`
* `eac3`
* `flac`
* `m4a`
* `x-m4a`
* `mp2`
* `mp3`
* `ogg`
* `wav`

Other important requirements:

* file size must not exceed 250 MB
* sample quality matters more than sample quantity
* noisy samples can give poor results
* more than about 5 minutes of total audio usually adds little value

## Permissions and safety

Only upload voices you have the right to use.

Do not use protected voices such as:

* celebrities
* politicians
* other people whose voice rights you do not have permission to use

Protected or disallowed voices can fail validation.

## Best practice for sample quality

* use clean recordings
* avoid background music
* avoid heavy room echo
* keep the voice style consistent across the sample set
* prefer one speaker only

## Related pages

* [Voice overview](/docs/voice/overview)
* [Voice cloning best practices](/docs/voice/voice-cloning-best-practices)