First of all, thanks for all the effort to research and model this!
A friend of mine did some modeling as well, and came to the conclusion that there should be a treble increase, rather than the perceived decrease:

Even though the exact values differ from your (probably more correct) model, the effect is clear.

So, what could we really conclude from all this? That our models are too simplistic? It seems like they contradict your empirical tests? One indication of the complexity is the fact that in your real recording example, the 12th and 13th component is really louder in the rolled-off case, right?

Thanks

@LarssonGuitars Thanks for your reply - it's definitely an RLC issue somehow, but strangely enough a friend and I did some modeling and came to the opposite results, i e there's a treble boost as you increase the resistance. (I have a pic but I'm not allowed to upload it (?)) .

Knowing why isn't going to help my playing, just my peace of mind :-)

Cheers

Hi,
it's commonly known that most electric guitars lose treble when you roll off volume, and there's plenty of modding descriptions around, involving capacitors in parallel with the volume pot for example. I've always wondered why even modern guitars rarely have this compensation from factory. But I'm even more curious to understand exactly why the volume pot acts like a low-pass filter component together with the pickups, the cable and the amp's input impedance. Is there anyone who could explain what's going on?
Cheers/Par