free plugins …
https://www.izotope.com/products/vinyl/
https://cymatics.fm/products/origin-vintage-plugin
https://bedroomproducersblog.com/2023/11/20/bpb-dirty-vhs/
Helmet Radio … https://forum.audacityteam.org/t/how-to-make-your-voice-like-this-presumably-helmet-radio/47292/13