To use a natural or any external sound, exploring it by stretching it, modifying its pitch, filtering it, cutting it into slices... in short by manipulating it in all the most unexpected ways, then associating it with others was the innovation of ‘musique concrète’.
https://en.m.wikipedia.org/wiki/Musique_concrète
There are many modules that allow this work: choose the 'Sampling' function in the 'Modules' section (Module Finder) and you will have a long list of modules for this.
This way please :)
Then, you can still associate any other module that will fold the result, distort, create an envelope, place it in a space (with more or less reverb)... Any traditional complementary modular function.
In theory there are two sound synthesis techniques for dealing with acoustics; there is the traditionnal Sample-based synthesis and the Granular synthesis: both are well developed in the modular universe.
Everyone can work in their own way. Personally, and like many modularists, I have currently invested in granular synthesis (Qu-Bit Nebulae, Make Noise Morphagene, alongside Monsoon and Beads which are also effects, modules derived from Clouds). I completed with a more modest module (Tiptop Audio One) to include samples, considering that the computer is also a first way, upstream, powerful and fast to process any audio sources.
But again, to each his priorities, his preferences...
The recording of a radio extract on a Usb key or Sd card can then be processed by a granular synthesis or traditional sampling module, and it can be easily preserved as @wishbonebrewery indicates...
We can therefore think of separating any authentic Fm or vintage radio (or other audio sources like microphone, K7, Cd, Tv) from modular processing, it’s also more economical: in cost and HP.
The looper function allows you to manipulate the audio. This function, which is the basis of the freeze function, is integrated into many modules. But many use an external looper: this is the case of the legendary Todd Barton...
'On ne devrait jamais quitter Montauban' (Fernand Naudin).