Hi quality DRY wet control?

[loss1234]

I am building this crazy guitar/synth effect for my friend that basically takes a signal and puts it through a filter, lfo's a ring mod,etc. it sounds crazy.

BUT what i want to be able to do is have a DRY/wet control at the very start of the circuit that allows the player (my friend) to use this fx at the start of HIS effects chain which plugs into his amp.

What i was thinking was a simple pot that goes between the input and the first set of circuits. BUT i was wondering if i should do this with just

A= a simple passive voltage divider (and if so, what value pot? 5k?)

or

B=some kind of active, opamp wet dry control. if i go this route, i dont know how to proceed, and i dont know which kind of opamp to use (i want something ULTRA HI FI so that it doesnt take away or add anything bad)

this will be used with a guitar.

thanks

[goodrevdoc]

Loss:
Start with an opamp section, configured as a simple input buffer. Take the output of that and run it into your effect. Tap off another output from the same output, but run it ot where it will meet the output of your effect. Take this clean output, connect it to the end of a pot. Connect the other end to the effect output. Run the wiper to an output opamp. The pot will control wet/dry. Value probably isn't that important, start with 50K-100K, linear taper. Reading back through all of this, it actually sounds complicated, but its not. Check out guitar pedal schematics that mix clean and effected signals at the output for a clearer picture. Choruses, flangers, and delays would be a good place to start. Let me know if this helps.
-justin

[factus10]

Loss,

If you don't have it already, the answer you seek is in Craig Anderton's Do-It-Yourself Projects for Guitarists.