I also very much disagree with all of Gordon's points. I'll add on top of yours that even just a slightly modified power supply circuit can yield a very different sound with different musical applications. I will agree however that often people are duped into buying super expensive sound stuff for no reason other than milking their for their FOMO (fear of missing out).<br><br><div class="gmail_quote"><div dir="ltr">On Sun, 9 Apr 2017 14:08 Mattias Rickardsson, <<a href="mailto:mr@analogue.org">mr@analogue.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 9 April 2017 at 12:45, Gordonjcp <<a href="mailto:gordonjcp@gjcp.net" class="gmail_msg" target="_blank">gordonjcp@gjcp.net</a>> wrote:<br class="gmail_msg">
> That doesn't really happen though. All opamps sound pretty much the same. All distortion pedals sound pretty much the same too, and it's really only the frequency response - which is not determined by the distortion "shape" - that gives it a particular tone.<br class="gmail_msg">
<br class="gmail_msg">
Quite an oversimplification. Different distortion pedals typically<br class="gmail_msg">
have a pre-equalisation that differs, followed by a nonlinearity of<br class="gmail_msg">
many kinds, followed by a post-equalization that differs.<br class="gmail_msg">
<br class="gmail_msg">
The pre/post equalizations not only shape the "tone" but affect the<br class="gmail_msg">
waveshape and hence the result of the chosen nonlinearity, and also<br class="gmail_msg">
determine parts of the dynamic behaviour.<br class="gmail_msg">
<br class="gmail_msg">
The nonlinearity (distortion shape) can vary - I can think of at least<br class="gmail_msg">
5 radically different distortion constructions used in commercial<br class="gmail_msg">
distortion pedals, and they do give different tones and frequency<br class="gmail_msg">
responses.<br class="gmail_msg">
<br class="gmail_msg">
Common for successful distortion pedals is that a good combination of<br class="gmail_msg">
these parts are chosen, since all of them are affecting the end<br class="gmail_msg">
result.<br class="gmail_msg">
<br class="gmail_msg">
> Building discrete opamps to chase a particular distortion shape is the sort of thinking that leads to folk buying specially-imported hundred-dollar rocks to damp out vibrations in their mains cables.<br class="gmail_msg">
<br class="gmail_msg">
True, locally produced hundred-dollar rocks do the trick just as well. ;-P<br class="gmail_msg">
<br class="gmail_msg">
When it comes to discrete op-amps and their usefulness today, I do<br class="gmail_msg">
think that they can be seen primarily as a distortion device - not as<br class="gmail_msg">
the hi-fi component solutions they once used to be. Using them would<br class="gmail_msg">
require that you know what particular distortion they give you, and<br class="gmail_msg">
why you want it. And they could very well be a valid choice, of<br class="gmail_msg">
course. But today there is no big need of replacing op-amps per se, so<br class="gmail_msg">
introducing another known type of distortion in the signal path might<br class="gmail_msg">
be a much more reasonable way than staring at clumsy discrete op-amps.<br class="gmail_msg">
:-)<br class="gmail_msg">
<br class="gmail_msg">
/mr<br class="gmail_msg">
<br class="gmail_msg">
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</blockquote></div>