In this study, we investigate the effect of programming with (without) music on electromagnetic waves in software developers’ brain and analyzing how music influences the overall result of their tasks. For this research, we use an EEG device to measure the brain activity of the programmer and analyze electromagnetic waves by calculating the arousal-valence coefficients and using pre-processing techniques (EEG studio). The experiment was performed with 8 software developers (5 undergraduates and 3 graduates). As a result, when programming with music, we discovered that the mean valence was greater while the mean arousal was lower. These early results suggest the feasibility of the technique.