Let's say you've got a batch of raw sounds you're working on for your library, making versions of them that are more 'production ready.'
Let's say that these sounds are 44.1 KHz / 16 bit.
I find myself doing this quite a bit. Running raw sounds through distortion plugins, outboard guitar amps, guitar pedals, playing the sounds through a speaker and putting up a mic in the room, running them through reverb plugins, processing them through outboard 'synths', etc... I find that having different versions of sounds around, processed in interesting ways, can make things easier and more interesting when I'm putting together a full piece later. So all these processed sounds serve as 'building blocks' for full sounds.
Moving on, here's the question:
Is it worth upsampling these sounds (necessary when importing them into a DAW session to match the session's sample rate whilst playing back at normal speed...or recording the results to a higher sample rate if playback and recording happen on two different devices) to, say, 96 or 192 KHz (and a higher bit depth like 24 as well)?
Is it safe to assume that harmonic distortion will, for example, create harmonics of even a 44.1K file that would require a higher sample rate to capture those harmonics?
And what if they're sounds that will be, for example, pitched down, layered with something else, and eventually pitched back up through some other process down the road when making more building blocks?
I don't necessarily want to expand the size, in MB or GB, of my library simply because I think it's cool to have a bunch of 192's in it for the sake of having higher sample rate files only. Is there a benefit beyond that ridiculously pointless reason?
I've experimented with pitching a 16 bit / 44.1K file up and back down and up and back down over and over again with, while interesting (and possibly usable for something interesting), absolutely dismal results (which, I would expect).