Oscilloscopes are incredibly useful for visualizing signals (audio or otherwise), but unless the software you’re using already has one built in, it’s not necessarily easy to see what’s going on.
- First you’ll need a tool to route audio internally. I used Soundflower, a free kernel extension originally developed by Cycling ’74 (the company that makes Max/MSP).
Check it out—an in-browser oscilloscope visualizing a few different songs using WebGL. The scope uses XY-mode, where the sample values of each stereo channel are mapped to each of the axes, instead of the X-axis representing time.