Distortion + question?

[Banjotaz]

After the input cap and before the op amp the circuit splits to some 1 megs and another cap to ground. Is this some kind of DC filter or something? please explain in detail if you could.

[al3151]

This page has some information- http://www.generalguitargadgets.com/richardo/distortion/index.html

[petemoore]

PS voltage divider, sets the bias for the input at 1/2 of supply voltage.