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

# Formats

> Input and output file formats supported by the AudioShake API

## Input formats

### Audio

| Format | Extensions      |
| ------ | --------------- |
| WAV    | `.wav`          |
| AIFF   | `.aiff`, `.aif` |
| FLAC   | `.flac`         |
| MP3    | `.mp3`          |
| AAC    | `.aac`, `.m4a`  |

For best results, use **WAV at 16-bit or 24-bit depth**. Supports up to 192kHz sample rate. Provide a stereo or mono track.

### Video

| Format | Extensions | Audio codec |
| ------ | ---------- | ----------- |
| MP4    | `.mp4`     | AAC or PCM  |
| MOV    | `.mov`     | AAC or PCM  |

Only the audio stream is processed — video content is ignored.

### Text

| Format | Extensions | Use case                                   |
| ------ | ---------- | ------------------------------------------ |
| JSON   | `.json`    | Transcript input for the `alignment` model |
| TXT    | `.txt`     | Transcript input for the `alignment` model |

## Output formats

Set output formats in the `formats` array when [creating a Task](/api-reference/tasks/create). Use the API value shown below.

### Audio

| Format | API value | Models                       |
| ------ | --------- | ---------------------------- |
| WAV    | `wav`     | All models that output audio |
| MP3    | `mp3`     | All models that output audio |
| FLAC   | `flac`    | All models that output audio |
| AIFF   | `aiff`    | All models that output audio |

### Video

| Format | API value | Models                       |
| ------ | --------- | ---------------------------- |
| MP4    | `mp4`     | All models that output audio |

Output video files contain the separated audio stream in the original video container.

### Text

| Format | API value | Models                                          |
| ------ | --------- | ----------------------------------------------- |
| JSON   | `json`    | `transcription`, `alignment`, `music_detection` |
| SRT    | `srt`     | `transcription`, `alignment`                    |
| TXT    | `txt`     | `transcription`, `alignment`, `music_detection` |

## Limitations

* Encrypted or DRM-protected content is not supported
* Multi-channel or surround formats (e.g. 5.1) are not supported