Pc Audio Visualizer is freeware software to visualize the audio played on the PC. It takes audio from sound card so any audio played on the computer could be captured. It displays the waveform of the sound, its fun to find out how the waveform behaves when different kind of sound is played: music, voice, song, and music instrument. The FPS (frame per second) is about how many sample of sound to capture a second, for each sample it captures, it will display a pixel wide bar on the waveform screen as you see. You can drag over or simply use u or /down ticker to set a value you want, feel free adjust and would be fun. Stop button will flip the running and stop status of the waveform display.