Using the editor’s mixer view, you can create evolving textures by crossfading between the four digital partials over time. On the hardware, you would need four hands. In the editor, you assign a single MIDI controller (like the Mod Wheel) to control the volume of Partial A and Partial C inversely (A up, C down). The editor handles the scaling curve.
You literally cannot do this without the editor. The JD-XA itself does not output parameter automation over standard MIDI CC for every function; the editor translates the plugin parameters into the synth’s native sysex language. roland jdxa editor work
: Copy, cut, and insert programs to reorganize your patch banks efficiently. Third-Party Editors (Advanced Control) Midi Quest (Sound Quest) Using the editor’s mixer view, you can create
The true "work" of the Editor lies in the details that are invisible on the hardware: Visualizing the Crossover The editor handles the scaling curve
To program the JD-XA editor, you could use a combination of MIDI and the editor software. Here's a simple example using Python and the mido library: