Online Virtual Oscilloscope (academo.org)

Cool but none of the basic stuff like "what does one reticule mean" and triggering isn't explained.

This is really cool vizualization.

I have just started creating voice/sound analysis tools myself and the first ones are located at: https://voicecoach.ai/voice-recorder

Over the next month I am planning to add pitch recognition.

Would be cool to create an X/Y mode for the scope using left and right channels for input. Then try some of Jerobeam Fenderson’s music.