To use MixEmergency with Scratch LIVE you only need to have the Rane SL 1 (though you would also want a MIDI capable mixer to control the crossfading of the videos). The Scratch LIVE software requires you to have the Video-SL demo installed to import videos into the Scratch LIVE library. MixEmergency is a visualisation tool only and does not handle any audio. All audio is decoded and processed by Scratch LIVE. If the audio is distorted in Scratch LIVE it could be one of several issues. You should first try loading the AVI file into Scratch LIVE without MixEmergency running to see whether the issue is caused by MixEmergency. If the sound is still distorted then it may be an issue related to the audio codec used in your AVI file. If the audio is distorted only when MixEmergency is running, could you please check that Video-SL is NOT running (Video-SL is not required to run while Scratch LIVE and MixEmergency are running, and if it is running, then it may be using CPU cycles) and let us know a little more about your system details (CPU, RAM, OS version, etc) and some more details about your video (dimensions, video codec, etc).