# Audio Formats

The following links provide users with detailed information about the types of audio files and compression compatible with Fuse.

* For details about the MP3 format: <https://en.wikipedia.org/wiki/MP3>
* For details about the WAV format: <https://en.wikipedia.org/wiki/WAV>
* More info on audio terminology: <http://www.stirlingaudioservices.com/gloss.htm>
* More info about mu-law or (µ-law): <https://en.wikipedia.org/wiki/%CE%9C-law_algorithm>

Plum recommends using the free Audacity application to record audio. Audacity is free and easy to use, but it also has in-depth tools and plugins for more advanced audio manipulation.

Follow this link and select the proper operating system download Audacity: <http://www.audacityteam.org/download/>

## **Supported Audio Formats**

When deciding on the audio format for an application, keep in mind that the Fuse engine automatically runs the files through a compression µ-law algorithm. This downsamples all files to 8-bit, 8kHz.

There are three audio formats for development that are always recommended:

* 8 kHz, 16-bit, linear PCM WAV
* 8 kHz, 8-bit, µ-law WAV
* 32 kbps, 16khz, MP3 (*Note: Anything larger is unnecessary. Poorly recorded MP3 files might not work with Fuse.*)

{% hint style="warning" %}
**Important Note**: All audio files must be recorded in mono, not stereo.
{% endhint %}


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