Guitar buffer with tone control

[The Twickerman]

Hi folks,
first post here!
I've looked around the site for a suitable circuit diagram - but couldn't find one.
I am looking for a very simple opamp based guitar buffer design (maybe TL071 based). I need to incorporate a pot to roll off the bass.
Has anyone here got any suggestions?
Ta!
- Nick.

[The Twickerman]

Whoops - I seem to have put this in the wrong section - and I can't find a way to delete.

Mods - please feel free to delete, I will repost in the appropriate place!

http://www.diystompboxes.com/smfforum/index.php?topic=88206.0

[petemoore]

  AMZ buffer page in Labs notebook...various buffers.
  Opamp may draw more current than say a Jfet, as well, a larger footprint to set up. Single and dual are same size, using both dual of course takes a few more parts/space to do.
  A dual Opamp would provide needed drive current + allow gain recovery after the TC, take a little more space.
  Opamp current draw is certainly a consideration for an effect expected to run of batteries exclusively.
  How long the battery will operate the TC and OA could be another matter also.
  Already expanding control cavity might do well to have 2x9v as split supply instead of V-divider. 
  TC = X-much passive losses / which tone control at what settings:
  Duncans Tonestack Calculator. Download it, prepare for an absorbtive learning drive...it'll program your mind into a Tonestack sponge, instantly...remember if the graphline is up the' frequency is boosted, middle [bout the same]...some TC's allow all frequency attentuations to move up/down at the same time, this would be a full range volume control.
  The TSC can be instrumental in choosing a TC while contemplating frequency compensations. It allows to multiply or divide...plot whatcha thinkya got across the screen so to speak. TC's are nice to match speaker/PU, this can increase percieved output level before the speaker [or something else] begins 'outphuting' [pronounced and sometimes heard as: out-futting], ie better tone @x volume.
  Iron it out, view from all angles, repeat if necessary, outside the guitar.
  Consider using 7band eq or other graphic to find this/that which you'd like to have control over, then build parametric or other such as notch filter which doesn't allow control over entire spectrum...mostly just where you want it.
  Joe got a wah control in his reconfigured Telecaster tone control, a Gagan video on YT showed the tele-tone-wah sound, very cool, passive.
  I did a little bit of ironing actives in a guitar, passive took because a not too long, stout cable to power supplied circuit area was found to be infinitely endearing.