I use this quite a bit:
They've got all the different filters you're going to bump into.
They've got all the different filters you're going to bump into.
+ a million^^^. Just shunting the pickup to ground with various values of resistance significantly changes this response. And this is why a few manufacturers make variable Z inputs for guitar centric A/D boxes, which is simply a pot going to ground. It totally works and I built a pedal for myself that incorporates this feature. So it only follows if we had a shunt to ground whose resistance was not fixed, but is instead frequency dependent, well, we all know how that ends...a frequency dependent filter. And from the ESR plots of the caps that provide that data, we can see that it is not linear.Not at all.
The tone control circuit / cable capacitance, in combination with the pickups's internal LCR characteristics, forms a resonant filter.
You may find this helpful http://buildyourguitar.com/resources/lemme/
Thanks for the link; I appreciate you taking the time to post it. I also respect your comments I've read on other issues. And I'm aware of the impact of capacitance issues of cables, pot and cap values, etc.., and the influence they impart on tone in the signal chain. I'm not debating that.Not at all.
The tone control circuit / cable capacitance, in combination with the pickups's internal LCR characteristics, forms a resonant filter.
You may find this helpful http://buildyourguitar.com/resources/lemme/
No argument there. Pot/cap values in a guitar tone circuit certainly effect tone. My point was, because the signal flowing through the guitar tone pot/cap is going to ground (and thus out of the signal chain), does the brand or style of cap really influence the signal remaining in the signal chain? The videos I linked suggest "no".+ a million^^^. Just shunting the pickup to ground with various values of resistance significantly changes this response. And this is why a few manufacturers make variable Z inputs for guitar centric A/D boxes, which is simply a pot going to ground. It totally works and I built a pedal for myself that incorporates this feature. So it only follows if we had a shunt to ground whose resistance was not fixed, but is instead frequency dependent, well, we all know how that ends...a frequency dependent filter. And from the ESR plots of the caps that provide that data, we can see that it is not linear.
The physical properties of the cap say "yes" since the cap's ESR changes the total resistance to ground (provided the tone pot is set so the cap is "in play") and in a non-linear way since the cap's ESR is not linear. Now, its completely fair imo to question whether the difference is enough to even be discernable. And for me, its so insignificant that I don't bother messing with them. But modeling does show that it is a real thing, as tiny and subtle as it is, and the mechanism is easily explained.No argument there. Pot/cap values in a guitar tone circuit certainly effect tone. My point was, because the signal flowing through the guitar tone pot/cap is going to ground (and thus out of the signal chain), does the brand or style of cap really influence the signal remaining in the signal chain? The videos I linked suggest "no".
It's the 'going to ground' phrase you're using that concerns me, it may indicate your analysis of the circuit is a bit offthe signal flowing through the guitar tone pot/cap is going to ground (and thus out of the signal chain)