Pc Audio Visualizer is a 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, it's fun to find out how the waveform behaves when different kind of sound is played: music, voice, song, music instrument, etc...
To get started

It's designed to be running when you start it. If it's not, you can select the device from the settings section and choose the source of the audio feed.

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 up/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.
Features:

1. Waveform visualizer of left/right channel
2. Device selection, and source selection to choose from "mixer" or "microphone" or other sources.
3. Always on top to avoid to be covered by other window.
4. Sample value display and vertical bar instant graphic display
5. winxp, win7 supported