Behringer fcv100 - "Blend" mod?

[jazzboxuz]

Hey guys, I'm new here been lurking for a while and this has probably been the most helpful board out of the ones I've seen... so thank you.

anyway, I'm picking up a behringer fcv100 next week- it's a volume pedal with two ins and two outs. Would I be able to wire it so the heel side would be 100% input 1, and the toe side 100% input 2? I want to do this to blend two independent signal chains, then sum the two outputs from the volume pedal to one output. if anyone has any experience with this pedal, comments, or similar projects please reply! I will upload gut shots ASAP. thanks!

[PRR]

> Behringer FCV100

Gee, that's cheap!!

> wire it so the heel side would be 100% input 1, and the toe side 100% input 2?

That seems awful useful. Did you check to see if Bee already makes such a thing?

Buying a Bee-ringer in hopes of modifying it is perhaps reckless. When you open it up you won't hardly see anything that looks like "parts". All the smallest (and lowest-cost) SMD chips and resistors.

Yes, you can compute any gain function. This one is "easy" though with some troubling practical details.

To make side B become 100%-0%, take the raw signal and the gain-controlled signal, subtract them. To also have side A, add gain-controlled A to the inverse-gain-controlled B.

Concept on top. Changes for single power supply below. One TL072 (must be FET input).

[jazzboxuz]

I don't think behringer makes something like that... and yes, this is a reckless project indeed. that makes it more fun though, right? 





you weren't kidding! those components are TINY. 

I'm going to see if I can figure this out.. thank you for the schematic and guidance! I'll keep you (and anyone else interested) updated on progress.

[rvperez]

Hi

is this pedal optical or resistive, I want to say have a potenciometro to measure the pedal or have an optical device as position sensor?.

Many thanks