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FC7 Expression pedal - DIY polarity mod


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Not new information, but thought I would document a bit more formally, having just built one...

 

The Yamaha FC7 expression pedal does not work correctly with Roland, Kurzweil and Arturia gear (and there may be others) because its tip-ring polarity is wired "backwards" (at least, as far as these manufacturers are concerned).

 

Friend-of-the-Forum Ashby Solutions (now closed) used to sell a nicely-built, sleek cable adapter (FC7X -- "X" for "crossed"), but as those are no longer available you can easily fashion a no-soldering-required equivalent with a couple of readily available Hosa "breakout" connectors.  Here's what you need:

 

1 - Hosa YPP-136 Stereo Breakout (1/4" TRSF to Dual 1/4" TS)

1 - Hosa YPP-117 Stereo Breakout (1/4" TRS to Dual 1/4" TSF)

 

Plug them together, crossing the connectors so they line-up red/black, black/red. Voile; you have a reversed-polarity adapter. Connect it in-line between your FC7 pedal and your keyboard's Expression jack.

YPP-136_Full_RGB_1800.jpg

 

YPP-117_Full_RGB_1800-600x400.jpg

 

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Legend '70s Compact, Jupiter-Xm, Studiologic Numa X 73

 

 

 

 

 

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