Question On Reversing A Sustain Pedal's Polarity


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I am getting a revered polarity issue with my Yamaha FC5 sustain pedal (it's engaged when it is NOT being pressed) when it is plugged into my Alesis VI25. Looking at the image below... if I swap the numbers for pressed and released values this should fix the problem, correct? I'm not with my unit or I would just try it, thought I'd ask, thanks!

 
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happyrat1

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It sounds like it should work in theory, assuming you solved your other problem of getting the values to stick in your configuration software.

How did that end up working for you anyway?

One thing to note. Yamaha and Roland Pedals are the opposite in polarity from just about every other manufacturer in the industry.

Otherwise the best option is to simply by a switchable universal pedal in the first place like the M-Audio SP-2.

Gary ;)
 
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It sounds like it should work in theory, assuming you solved your other problem of getting the values to stick in your configuration software.

How did that end up working for you anyway?

One thing to note. Yamaha and Roland Pedals are the opposite in polarity from just about every other manufacturer in the industry.

Otherwise the best option is to simply by a switchable universal pedal in the first place like the M-Audio SP-2.

Gary ;)
I haven't had a chance to try the fix yet for the other problem. I just remembered this was also a problem. I'll post my findings as soon as I can.
 

SeaGtGruff

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Just to be sure you're using the correct program, I notice that you say the VI25, and in your other thread you posted an image from the VI25 editor software, but in this thread you've posted an image from the V25 editor software. The V25 and VI25 are different models. Did you reinstall the editor software for the correct model after uninstalling the copy you had originally installed?
 
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Just to be sure you're using the correct program, I notice that you say the VI25, and in your other thread you posted an image from the VI25 editor software, but in this thread you've posted an image from the V25 editor software. The V25 and VI25 are different models. Did you reinstall the editor software for the correct model after uninstalling the copy you had originally installed?
I just found and linked this image from online. It looks exactly the same as the VI25 editor, same values shown as well. I haven't had a chance to get in front of mine yet to try the fixes mentioned in the other thread.
 
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Reversing the values fixed the problem... on to the other issues.
 
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Reversing polarity on FC-5 Pedal

I had this problem on my Yamaha prs-e360
Unplugged main plug while the sustain plug was still in, and then plugged the main plug back in.
 

happyrat1

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It's also always possible to wire up a Gender Changer/Polarity Switcher for a TS Sustain Pedal using a plug, a jack and a short length of shielded wire.

You could also wire one up for a TRS CC Pedal if you know the specs of the internals of the source and the destination.

Oddly enough, while they are common enough for coaxial power supply connectors, I can't seem to find one pre built for TS/TRS audio/music applications.

NOTE: While it's a relatively simple task to wire one of these up yourself make SURE that you get the connections right the first time.
 

happyrat1

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Here's a schematic on reversing the polarity of an EV-5.

It could easily be adapted to a plug in gender adapter.

EV-5_DIY_with_Polarity_Switch.jpg


Gary ;)
 
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SeaGtGruff

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That's above my pay grade edjeekayshun, but it might help some DIY person!
 
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happyrat1

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Actually all you really need to do is wire up a cable with a 1/4" TRS socket reversing the output of Tip and Ring to a 1/4" TRS plug.

Sleeve is always ground and remains unchanged.

Easy cable to make without hacking apart a brand new pedal.

Gary ;)
 

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