Please translate this screencast from german to english. Your task is to replace the audio track (music and voice) with an english translation of the voice. Please ignore the background music. The german slides in the screencast can stay as they are.

• Download the screencast from http://nienhueser.de/marble/n900-screencast/Marble.mp4
• Write down what the speaker says and translate it to english
• Get a microphone and record your translations. Timing is crucial!
• Replace the audio track in the video with your translation
• The result is both your translated audio track and the translated video (original video with the audio track replaced by your translated one)