This work is about feedback sound, made with daily electric devices such as laptop speaker. I was firstly inspired by the howling sound when I played my old videotapes. And I recorded the feedback sound to implement two different type of sounds; primitive sound like noise and melody in major scale. The recorded feedback sound was mixed and transformed (to midi note) in Ableton Live 9. This sound gives a feeling of remaining energy via endless feedback loop and the distorted sound gives a spatial perception which contains a lot of data of a certain time and space.