bypass pop questions

[Unclerny]

Hi Forum, I'm having a loud pop when I bypass one of my pedals I designed.  That means a little needs explained.

The pedal is basically a Parallel distortion/ clean.  It's has four opamp stages with the middle two in parallel.  The first and last are simple buffers.

I put a 1M res on the input but there's no output volume pot after the output buffer just a coupling cap.  The voulme is controlled in the middle two stages.

Do I need some kind of resister on the output to ground to stop this overly loud pop when bypassed?

Thanks UE

[R.G.]

The how and why of the pop you're hearing is discussed at length at
http://geofex.com/Article_Folders/box_pop.htm
under "Tech Tips" at GEO - http://www.geofex.com

[Unclerny]

So I need a pull down resister after the output cap.  And by the article 100K.

Thanks, UE

[JisforJustin]

RG-

OK. So I am building an original fuzz effect and cannot seem to cure the bypass LED popping problem. I have tried to combine RG's suggestion (from http://www.diystompboxes.com/smfforum/index.php?topic=44109.0):

"Split the LED resistor in half and put [a] cap there"

And Zach's suggestion (same thread):

"Use at least a 15k to 22k resistor and an ultra-bright LED"

What I tried was to use two 10k resistors with a 47uf cap, to ground, in between, and a super bright LED. I even tried adding a second stage of 10k resistor and 47uf cap. This seems to help slightly with the popping, but it is still quite prevalent. I also tried various LEDs and they all did the same thing. I am 99% sure it is coming from the LED, because when I cut the lead to the LED the popping goes away and the effect sounds great. Does anyone have any other suggestions to try?

Justin

[A.S.P.]

could be the routing of the wires, especially the grounding ones...