[p5js] Is there any way to change the shape of the amplitude?

Hi
I'm a noob in coding and programming. I'm recently working on the small project.
After watching your video in Youtube (11.9: Sound Visualization: Graphing Amplitude - p5.js Sound Tutorial) I'm thinking about a way to change the shape of the amplitude line. Could you please teach me how to do this? Thank you so much !

The issue points to the p5.js Sound Tutorial video but names no repository file, test, or specific target shape. Start by reviewing the referenced amplitude-visualization example and clarify the desired transformation before defining what documentation or example would count as complete.

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