Adding mid control to a booster

[Stinger25]

Hi,
I want to build a SHO with mid control (cut/boost knob),
would appreciate your suggestions about how to approach that

[IvIark]

It's not as easy as a simple passive low or high pass filter and needs to be active.  I'd suggest also adding a Demeter Fat Control to the same box:

http://tagboardeffects.blogspot.com/2012/09/demeter-fat-control.html

[IvIark]

Or maybe eje's filter:

http://tagboardeffects.blogspot.com/2013/02/eje-filter-mark-1.html

[Stinger25]

Thanks for the response, Mark.
Yep, for high/low filter all that needed is to play with caps, mid is problematic...
I thought about the demeter fat control, but isn't it also a booster? Or is the fat control just controls the amount of mids?

[IvIark]

It has to be a booster as well or you would only be able to cut mids.  It's an active filter and so has the ability to boost as well as cut the frequencies, as opposed to a transistor gain stage booster like an LPB1 or SHO for instance.

[Stinger25]

So if I want a booster with mids control I should stack it: Demeter->SHO?

[dodido]

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[Jon Rep]

Good Post Stringer25.  You , Mark and dodido have now got me interested in Building the Dementer Fat Control and having a closer look at the Eje Filter & Mr Eq from ROG. Thanks.

[Stinger25]

Thanks for your help, guys!

[Madferret]

If you want to have something with tone control rather than just a mid boost why not try the AMZ Tone Control it's based on the Big Muff tone stack but with an added pot to control the amount of boost as well as the frequency it's boosting, I think version 2 would be best for what you need.  You'd need a small boost section after it though as it will make the pedal loose some volume.  Since it's from the Big Muff why not use the gain stage from that:



I drew this up as a daughter board but it should be simple enough to add it to an existing vero.  Green wire is input, blue output, red 9v, black ground.