Boss OC3 bass/guitar mod

[ghiekorg]

Hello everyone,
Yesterday i realized a small box with 3 jack inputs and 3 jacks coming out of it. My idea was to use it as IN/OUT for the whole pedalboard and but placing an OC3 as first pedal with both input jack plugged in. This to avoid pluggin the bass or guitar in a different hole everytime. Maybe a pic would help understand.



Problem is: when both jacks are plugged into the OC3, the bass one doesn't work. Do you think is there a way to mod it so that one doen't cut off the other? I couldn't find any OC3 schematics, though...

Thanks

[antonis]

Could you post a pic of the OC3 IN jacks..?? 

[ghiekorg]

You mean like this or you mean the inside of the pedal?
https://musicplus.tn/modules/ajaxzoom/axZm/zoomLoad.php?azImg=/img/p/5/1/0/5/5105.jpg&qual=80&width=1200&height=1200

[antonis]

Νο... 

I mean your particular box jacks & wiring..
( I suspect Bass signal GND is somehow interrupted..)

[ghiekorg]

aah sorry, misunderstood.
No the problem is not in the wiring i guess. I really tried to just have a bass plugged in together with a random jack inside the guitar IN and no sound came out until i just removed the jack from the guitar IN. I think the guitar input cuts off the bass one (?). But if you still wanna see my box i can send you a pic when home

[antonis]

If so, then OC3 pedal has selectable inputs, in the mean of it utilizes only one at a time..

In such a case, you'll need a mixing circuit inside your box with only one jack out..
(but I'm not sure for the audible result..) 

[11-90-an]

I have a feeling the guitar in jack is stereo and it switches the bass input off when it's plugged... maybe you would have to cut a trace...

[ghiekorg]

Here is what happens
https://www.youtube.com/watch?v=FPN2gY2A5so&ab_channel=ghiekorg

So i guess it's not an easy fix here