Currently, Flash not support using MIDI file directly.
This type is the smallest audio file, so it very familiar for the mobile device.
It only record the data, if your device support 40~64 audio track then it is as good as MP3 file.
If you use Macromedia Flash MX 2004 to create your Flash Lite content, you need a Flash Lite Bundler to let Flash Lite recognize the formats like MIDI, 3gp..supported by your device.
You can find the Flash Lite Bundler in Flash Lite 1.1 CDK.
Flash_Lite_authoring_updater/Flash Lite Bundler/FlashLiteBundler.exe
The way to use it is very simple, click the execute file and drag your MIDI file drop to below screen.
One type needs one file, let Flash Lite recognize the type not all files.
Press “Save Bundle” and save into the folder with your MIDI file. Before you using the MIDI file, you need to covert it to other type which supported by Flash, like mp3, wav. Then you can import these file to Flash.
After you import the audio files into Flash, open the Library and choose properties via options menu. Set the device sound in export settings.
Then you can use these sound like usual, just remember keep the file path when you put into your device. If the file exist and the path is correct, then you can play the sound from you device. It makes your content smaller and has more interaction with sound.
Posted by Carol 
