Lehle Dual Expression, switch function

Benedict · Jul 26th 2023

The Dual Expression pedal's manual (page 18) refers to the Kemper's settings when it comes to making the pedal work. Which is where I'm stuck. I followed all instructions on page 18 (using TRS cables) and was hoping I could thereby activate the Kemper's Wah with the pedal's switch function (and thus change the expression function from volume to wah. Not working. The pedal provides a silent click at toe position, indicating that it switches. But that doesn't seem to impress the Kemper.

On the pedal, the steady blue light suggests the latching mode is selected which I guess is preferred over momentary. Can Kemper "read" the Lehle's switch signal at all? Any help is welcome!

Wheresthedug · Jul 26th 2023

Sounds like you need to configure the Kemper input type as a Mono Switch and the function as Toggle On/Off whichever Stomp Slot you have the Wah loaded in (probably A or B in most cases). Once the Kemper is configured to action the incoming switch clicks everything should work as you want.

whippinpost91850 · Jul 27th 2023

Shouldn’t the cable from the switch ba tip/sleeve cable

Wheresthedug · Jul 27th 2023

Quote from whippinpost91850

Shouldn’t the cable from the switch ba tip/sleeve cable

Yes but in most cases a TRS can be used in place of TS but not the other way round,

Kellerblues · Jul 27th 2023

Quote from Wheresthedug

Yes but in most cases a TRS can be used in place of TS but not the other way round,

Yes, but if you use a trs one, the Kemper will see 2 switch connected and you'll have to use the dual switch options on the FC settings

Wheresthedug · Jul 27th 2023

Quote from Kellerblues

Yes, but if you use a trs one, the Kemper will see 2 switch connected and you'll have to use the dual switch options on the FC settings

The Kemper doesn’t care what cable it is as long as the Type is set to Mono. I’ve just tested it with 2 TRS turning Wah on/off in the Mission pedal.

It is possible I suppose that the Lehle needs to see a TS though.

Benedict · Jul 28th 2023

Thanks so much!

Here is how I applied your advice:

Pedal 1 set as Mono Switch to toggle "Pedal B" on/off, Wah is defined as Kemper's "Pedal B" .

Pedal 1 is connected with the Lehle's 10k jack, TRS.

Pedal 3: Pedal Type 1, Function Wah Pedal.

Connected with the 50k, TRS.

Obviously the Lehle is a Wah-only pedal now, no Volume function when Wah is not activated. It would probably be a mess anyway: when trying to activate/click the Wah with the pedal, the volume level will necessarily change in a completely undesired way.

The (typical) Wah pedal movements activate the switch too often inadvertently, that is my first impression at least. (I'm sure this doesn't happen with the Mission). Using one of the Stage's effect buttons seems the safer method. In which case I would have a closer look at the volume/wah combination again and discard the switch function.

How can/will Volume be disabled when the Wah is deployed? Obviously it should be a "OR" approach, not "AND".

Wheresthedug · Jul 28th 2023

Inbought the Mission to have the footswitch like a real Crybaby but to be honest I’m slowly coming round to using the other On/Off options. Bypass at Stop would probably work best with a shared Wah / Volume.

whippinpost91850 · Jul 29th 2023

I use Wa, to be off at heel, that way I can have the cocked Wa sound for a couple to songs

Wheresthedug · Jul 29th 2023

Quote from whippinpost91850

I use Wa, to be off at heel, that way I can have the cocked Wa sound for a couple to songs

Yep, that’s a good and perfectly valid use. 🤘

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