Looking for a DIY project or kit for something similar to the SOMA Labs "Messeiver" radio

I'm not much of a radio hobbyist beyond the fact that I dork around with LoRa a bit, and keep handhelds in the car for when my son and I are railfanning. My experience posting this over in /amateurradio hasn't made me any more excited to join their community/hobby either. That said, I am a DIY\modular synth/electronics enthusiast and (specifically due to its random nature) have been interested in building something similar to what SOMA has created with their "Messiever" radio for use in music sampling/improvisation/performance.

Link: https://somasynths.com/messeiver/

Description:

MESSEIVER is an irrational device for exploring the world of primal, wild radio reception – the way it was first experienced by the pioneers of radiocommunication.

MESSEIVER – is a shortwave receiver that is capable of receiving different stations from all around the Earth. Its peculiarity is that it doesn’t have the classic input tuning circuit, which lets you select a single station. Instead, it captures a big part of radio ether as it is. This way you can listen to many radio stations at once from around the globe. The set of stations that you can hear, their loudness and sound are defined by numbers of constantly changing global natural parameters. Weather, solar activity, cosmic particles, clouds and dozens of other phenomena define radio waves propagation, turning the world into a global DJ that makes a unique mix of radio stations here and now, exclusively for you.

MESSEIVER has a luxury vintage handmade build with brass inlay, wide range old school speaker, custom coil, NOS germanium diodes, vintage neon bulb and other things which make the impression and vibes of it unique.

So, nothing about this sounds proprietary, or even particularly complicated. What I'm curious about is whether someone with more knowledge of radio can identify what exactly this radio is doing and hopefully point me towards guides on how to construct one myself (or kits of decent quality to get me started down that path). I'd even be interested in ideas on how to mod an existing commercial radio to get it to (mis)behave in the same way as this ridiculously overpriced device.

Thanks in advance.