You can change the width, line width, height, sensitivity, number of bands (peaks), and color through the "Edit variables" context menu option

When launching the skin for the first time, the spectrum width is automatically adjusted based on your computer's CPU usage

Clarification: The "Wave" visualizer is not an oscilloscope (sine wave or time-domain signal). It simply plots intepolated frequency band values as points connected by a smooth line

GIF was recorded in ScreenToGif