Component Question?

[Structo]

Can anybody tell me what this 10M resistor does in the circuit?
Thanks

[phalanges]

It stops a pop when you switch to OD I believe.

[heisthl]

This layout has 2 caps in series feeding the OD when the relay is engaged, which removes some bass from the clean signal so it doesn't overwhelm the OD entrance. The resistor provides a ground reference between the 2 caps, the difference without it is not extreme but is noticeable.

[Structo]

Here is the full layout, what two caps are you talking about that the 10M references to ground?
Thanks

{NOTE: this layout has an error on it, on the filter board so do not refer to this as a build layout!}


EDIT:
Never mind, I see it now.
This might be exactly what I need to tame the bass on mine.