I'm completely new to Processing and I want to make something like a real time spectrum analysis on an android phone. I thought I could use the media Recorder ,the Media Player and the Visualizer. I managed to record sth with the build in microphon but i can't play it with the media Player although it's the same path. 

Does anyone have an idea why I can't read that file?

Does anyone have a better idea how to do this? 

Does anyone know how the Visualizer works?

Greetings