# Preparing your environment

Before you can start to work with MIDI files, you system setup has to be correct:

1. Make sure your environment is set up as described in Installing ARIA using drag and drop.
2. Check that the appropriate files and folder exist, as described in Files and folder setup.
3. Launch the 3DO Debugger and then launch ARIA, as described in the section Starting ARIA.

### Available example files

The following files are available on the Toolkit CD-ROM:

- A number of .aiff samples in the AIFF Samples folder.
- A PIMap file, a sample, and a MIDI project file in the ARIA Examples folder.

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