Re: [AH] Wiring standard for synth expression pedals?

From Tristan
Sent Mon, Dec 10th 2018, 03:42

Hi Brian,

It looks like the Xpander would work with one of these pedals

https://www.syntaur.com/Items/CVP100.html

/Tristan

On Sun, Dec 9th, 2018 at 6:24 PM, Brian Willoughby <xxxxxx@xxxxxxxxxxxx.xxx> wrote:

> Hello all,
> 
> I just ran into a situation where my Ensoniq Expression Pedal is not
> compatible with a new USB-MIDI controller. Is there one standard for wiring a
> passive expression pedal, or is there more than one?
> 
> The Ensoniq pedal is wired with Ground on the Sleeve, Power on the Ring, and
> the wiper signal on the Tip.
> 
> The USB-MIDI controller is putting out Power on the Tip, and expecting the
> signal on the Ring, but if I push the pedal to minimum then it shorts out the
> power! Clearly, the two products are not compatible.
> 
> I’m wondering whether this is common. I really only have one pedal, so
> I’m not familiar with whether everything is compatible or not.
> 
> Taking a quick look at the Oberheim Xpander Service Manual, it seems that
> their Pedal inputs are not wired to provide power. They’re evidently
> designed to expect the pedal to have its own source of power for CV. It seems
> to be a TS jack, but at least the signal is still on the Tip.
> 
> Brian
> 
>