How to create sound wave art?
Any sound editing program can show you the audio waveform. Audacity is a free cross-platform one, or you could use Adobe's Audition (subscription based though there is a free trial). They don't specifically export waveforms as images, but you could screenshot the waveform and beautify it with the image editor of your choice.

Alternatively you could use one of the many online visualiser pages. This one is a good example, it can export the waveform as an SVG graphic. https://www.misha.studio/waveformer/