CV pal is the link as far as note voltage and gate from the external sequencer (Logic). It can also be a modulation source with Logic providing external MIDI control. The MIDI part is of course emulated as this is a USB interface, but in practical terms it is the MIDI to CV/gate converter. As it only works with the USB 5V DC source, the keyboard tracking is limited. But I barely know how to play a keyboard anyway, so im happy if it tracks a few octaves.