I hooked my MuRF up in stereo last night for the first time, and seem to have encountered a problem. When it is bypassed, the signal only appears to be sent to the left/mono output, and not both. Does it only output to both when active? It’s a bass MuRF btw.
Don’t know if this will help you alot…but if i look at the Bass Murf manual it states the following :
AUDIO PATH: The bypassed signal goes to the LEFT/ MONO
output jack. Thus, when the Bass MuRF is bypassed, the signal at
the LEFT/MONO output jack is the same as what your instrument
is producing, and there is no signal at the right output jack. The
MF-105B will not pass an audio signal unless power is applied to
it.
Also keep in mind to use TS cables for the audio signals.
Thanks, I missed that in the manual. Answers my question, and is actually quite disappointing…I was hoping the signal would be sent to both outputs when bypassed.
there is a little pad on the circuit board that is like a jumper; you can add a blob of solder there to change the bypass from mono to stereo.
My preference would have been to have stereo bypass be the default, but apparently it slightly weakens the audio output to split it from one channel (mono in) to two channels (stereo out), so mono bypass is the default. Stereo is an option, though… as long as you have access to a nice soldering iron with a fine tip.
Cheers,
Amos
oh hang on; it’s only a soldering issue on the new MIDI MuRF.
If you open the back of the regular or bass murf, there is a big obvious black plastic jumper on a row of three pins to set bypass mono/stereo. If it’s mono now, move the jumper to the other position and it will be stereo. Easy peasy.
-Amos
Amos,
Is the pad labelled on the circuit board? Could a switch be soldered into the pad, instead of just shorting it with a blob of solder? Would there be any grounding issues if the switch was then mounted to the bottom cover?
Edit: Is there even enough room to mount the switch to the bottom cover?
Thanks,
Bob
Thanks Amos, great help. Of course I will be replacing my Bass MuRF with a MIDI MuRF at some point, so I will need to get soldering…
You don’t need soldering…just like Amos said…just move the jumper… 
thanks Amos i had the same question
I meant I’ll need to get soldering when I get the MIDI MuRF 
Lol…that’s true…i get it now…
The short answer as to whether it would be OK to solder a switch to the Midi Murf to enable mono/stereo bypass mode-switching is… I haven’t tried it, so I don’t know. But it sounds like it would be OK.
Yes the pads are labeled: “IN to L&R” above the pads, and “JMP3” written vertically to the left of the pads. Location is upper middle of the circuit board as you look into the underside of the pedal with bottom plate removed.
Cheers,
Amos
Thanks, Amos.
Bob
Hi everybody!
I was just going to solder my “DIY True ByPASS /Active Splitter” with the integrated board of a Palmer PGA03 and a 4PST Footswitch…
And I just descoverd this solution on this topic!
So 1st: Thank’s Amos!!!
but I have a small question about the signal path:
when you say:
but apparently it slightly weakens the audio output to split it from one channel (mono in) to two channels (stereo out),
Do you mean that it’s like a passive y splitter?
Do we loose some signal?
Or does the bypassed signal thru a buffered output ?
Just because I don’t realy want to get a loss of signal…
Thanks!
(Sorry for my English)
Hi,
Ive been looking for an answer, and found it! Second question; My moog 104m delay keeps the input and output level controls active all the time regardless bypass status. Id like this for my midi-murf too. Is this possible achieve via one of the jumpers or some other setting?
Allthebest Thor
Is this really true? I’m using TRS cables for connecting my Foogers together. No apparent problems on this end, I’m assuming that they just use the TS portion of the cable and ignore the Ring.
Stephen
.
Just wanted to chime in and tell that I’ve done this small mod (input to left/right).
Works great, now I have the input signal on both Left and Right channel even when the MF-105M is off.
Hi folks,
sorry to dig this thread out.
I would like to know how to set my Midi MuRF to stereo out when bypassed.
Had open the back and this circuit thing do really confused me.
I couldn’t identify the jumper to flip. Not sure whether the Midi murf could do the same adjustment.
Suggestion needed! Thanks 
Just follow the magic footprints…
Wow! Thanks for your reply, though it looks super tech difficult 
I guess I should bring my murf to tech worth trust to see if he can solve this soldering thing for me.
Thx