I just got a DN Keys 2nd hand and though the control inputs show a modulation source moving, they don’t affect their respective parameters.
I made a short video, you can see an external LFO affecting input B, but the sound does not change.
Also tried this with an expression pedal, the Digitone shows the movement but the sound doesn’t change either.
On another note, when setting up Control input B, in the Mod menu it shows as Input A, it’s a minor bug that you can see later in the video.
I am on the latest firmware. Any advice?