You can switch—or smoothly crossfade (morph)—between the presets of the upper manual. See Vintage B3 Morph parameters.
Important: Morph controls are spread across two windows. Click Main in the control bar, then click the Preset button at the lower right to view the Morph slider. The Options window contains advanced Morph controls.
In Logic Pro, click Options in the control bar.
Choose Learn from the (Morph) MIDI Controller pop-up menu.
When Learn is active, the parameter is assigned to the first appropriate incoming MIDI data message.
Move the MIDI controller on your MIDI device.
Learn mode has a 20-second time-out function: if Vintage B3 does not receive a MIDI message within 20 seconds, the parameter reverts to its original MIDI controller assignment.
Once you have chosen a controller to use for switching or morphing between upper manual registrations, you can determine the number of preset keys that are affected. You can morph between two and eleven presets for the upper manual.
Morphing always begins with the top preset key, the B.
If Range = A#, you morph between two presets.
If Range = G#, you morph between four presets (B, A#, A, and G).
If Range = F#, you morph between six presets (and so on).
In Logic Pro, click Main in the control bar.
Click the Preset button at the lower right.
Click the Select via Keyboard On button.
Play two keys on your MIDI keyboard to set the morph range.
In Linear mode (morphing), the seamless crossfades result in a variety of new draw bar registrations that you might want to save. You can change draw bar positions manually, before saving.
In Logic Pro, click View > Controls, then choose a preset key from the “Save Morph to” pop-up menu (near the bottom of the Preset parameters).