Thanks so much Dave for your help. I appreciate it.
I would like to use the “ assignable “ pedal to increase volume and perhaps for some other purpose. Do you kmow how to do this or have a video link by any chance ? Again thanks
You need to purchase an expression pedal. Examples include: Roland EV5, Yamaha FC7, Boss 500L are examples of these type of pedals (google them).
Expression pedals use electronic measurements to determine movement of the pedal, whether it is fully toe up, fully toe down or somewhere in between. so the assignable port actually produces a 5V(?) charge into the pedal, through its jack, in order to mathematically do the measurement. Like sustain pedals I mentioned above, there are two different pedal types in the market. Roland and most companies use a measurement scheme of Tip to sleeve using what they call a "wiper" to do the measurement. Yamaha and Korg had to be different (for the sake of being different) and use Ring and sleeve to do the wiper measurement. Tip/ring/sleeve are what make up a male TRS jack that you'll see on all expression pedals.
So you should purchase an Expression pedal that is compatible with your keyboard manufacturer otherwise the pedal won't provide a linear response from toe up to toe down on the pedal. Because you have a Korg my recommendation would be to purchase a Yamaha FC7 pedal, which I believe is compliant with Korg. Plug it into the assignable jack and it will provide both volume control (in the MIDI world known as CC#7) and also expression control (in the MIDI world also known as CC#11).
what's the difference between CC#7 vs. CC#11 and when would you want to use either one? ->
link (note in this article he at one point types CC#1, he meant to type CC#11).
Here is how Kurzweil explains it, an excerpt from their site: " ..Our keyboards require a pedal with a TRS 1/4″ connector and 10k linear potentiometer. Most manufacturers EXCEPT Yamaha and Korg make pedals with the same specifications and should work. Yamaha and Korg pedals typically use an exponential potentiometer and therefore will not work correctly..."