Hi folks. First post here. I just got a guitar MuRF. Absolutely love that damn thing. My question, though, is about hooking up an expression pedal to it. I have a crybaby wha pedal with its own power source. Will that do? For all I can figure out myself, it's not. But I'm kind of tech-challenged. I've also got a Boss multi-effects unit with a pedal that can control external devices through MIDI, but that's MIDI.
Any ideas? Thanks much!
what can I use for an expression pedal?
A 50k potentiometer is all that's needed. Of course, the Moog EP-2 will work, but if you want to save money, get a cheap project box, a 50k LINEAR taper potentiometer, and a 1/4" TRS jack. Funny how this post went so long without an answer. 
Minitaur, CP-251, EHX #1 Echo, EHX Space Drums/Crash Pads, QSC GX-3, Pyramid stereo power amp, Miracle Pianos, Walking Stick ribbon controller, Synthutron.com, 1983 Hammond organ, dot com modular.
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Lux_Seeker
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I think you may be confusing a few things here (original post) and perhaps I can clear things up. As the 2nd post says, all you really need to do to control a fooger with an expression pedal is the right range of resitance. An expression pedal is really just a potentiometer with some gears to use the verticle postion of the pedal to turn a potentionmeter (which is a variable resitance source).
Wah pedals are really just like a low pass fooger with an expression pedal attach to the cuttoff in but without any control voltage inputs. Some of them are more sophisticated with a variation resonance (or Q as it is sometimes called). But the cry baby will just produce an audio signal so pluiging it into any of the CVs of a fooger will produce varies and unepected results but not what you are looking for.
Not all expression pedals are also going to necessarily have the same resistance range. You would have to check the specs of Boss and Moog to find that out. I have a few Boss pedals to that take an expression pedal.
You can also use other source of resistance like a photocell.
If you buy a fooger as a guitar pedal I would say you have spent way to much. But if you want to learn what the CV inputs are for or you will buy more fooger and therefore have lots of CV options, then I would recomend foogers hightly.
As for MIDI. There is an expression pedal code in MIDI but it usually comes from an external expression pedal that work like Moog's or Bosse's or whatever pedal you use. MIDI is a digital signal and that coforms to a standard so computer based musical instrument can talk to one another.
Hope that helps.
Wah pedals are really just like a low pass fooger with an expression pedal attach to the cuttoff in but without any control voltage inputs. Some of them are more sophisticated with a variation resonance (or Q as it is sometimes called). But the cry baby will just produce an audio signal so pluiging it into any of the CVs of a fooger will produce varies and unepected results but not what you are looking for.
Not all expression pedals are also going to necessarily have the same resistance range. You would have to check the specs of Boss and Moog to find that out. I have a few Boss pedals to that take an expression pedal.
You can also use other source of resistance like a photocell.
If you buy a fooger as a guitar pedal I would say you have spent way to much. But if you want to learn what the CV inputs are for or you will buy more fooger and therefore have lots of CV options, then I would recomend foogers hightly.
As for MIDI. There is an expression pedal code in MIDI but it usually comes from an external expression pedal that work like Moog's or Bosse's or whatever pedal you use. MIDI is a digital signal and that coforms to a standard so computer based musical instrument can talk to one another.
Hope that helps.
Bandpass is equal to wah pedals. Any filter can make a wah type effect, but bandpass filters are used for wah effects the most. 
As for EXPRESSION devices, I use a home made box with four 50k pots and four 100k pots, each pot wired to its own 1/4" TRS jack for my 'Foogers, and a 20" ribbon controller for the filter of my LP. Also, a voltage of <1-5v can be applied to any of the CV jacks using a regular TS cable. Really, the doors are wide open!
As for EXPRESSION devices, I use a home made box with four 50k pots and four 100k pots, each pot wired to its own 1/4" TRS jack for my 'Foogers, and a 20" ribbon controller for the filter of my LP. Also, a voltage of <1-5v can be applied to any of the CV jacks using a regular TS cable. Really, the doors are wide open!
Minitaur, CP-251, EHX #1 Echo, EHX Space Drums/Crash Pads, QSC GX-3, Pyramid stereo power amp, Miracle Pianos, Walking Stick ribbon controller, Synthutron.com, 1983 Hammond organ, dot com modular.
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Lux_Seeker
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- Joined: Thu Mar 26, 2009 8:44 pm
Your right, thanks for the clarification. The filters used in wahs vary a lot but most probably do use bandpass and some with control over the width of the band.EricK wrote:Actually I think Wah pedals are more Bandpass than Low pass. LPFs will do wahs with resonance but theres a distinct difference.
But no arguments on anything else.
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Lux_Seeker
- Posts: 473
- Joined: Thu Mar 26, 2009 8:44 pm
I also have a ribbon controller although I have not made much with it yet. I also odered some vactrols and I have controlled foogers with photocells. Get a fooger in a dark room with a bright flashlight and a photcell and strange things happen. Turn of the resonance on the MP-101 to kick the fooger into self oscillation and you get instant therimim. I can't agree more, the door is wide open. That is why I love these beasts.Voltor07 wrote:Bandpass is equal to wah pedals. Any filter can make a wah type effect, but bandpass filters are used for wah effects the most.
As for EXPRESSION devices, I use a home made box with four 50k pots and four 100k pots, each pot wired to its own 1/4" TRS jack for my 'Foogers, and a 20" ribbon controller for the filter of my LP. Also, a voltage of <1-5v can be applied to any of the CV jacks using a regular TS cable. Really, the doors are wide open!