The RK-002 ‘Smart MIDI cable’ has already found it’s way in various setups, not just for the volca Sample. It looks like a +/-1.5m ordinary male-male MIDI-cable but has a microprocessor on board which ‘bends’ or even generates MIDI data on the fly. You can order it pre-installed for the Volca Sample, Kaossilator, Arpeggiator, Digitakt (/MOD),… firmwares so you can get started right away. If you decide to use it differently later on: You can switch firmwares as well (or even compile your own MIDI Processor!). Read more about the RK-002.
Firmware flavours available for the Volca FM, Volca Sample or even an Arpeggiator; Applicable for a wide range of synths which lack this functionality.
IMPORTANT NOTE: It is not wise to use multiple midi-powered devices on one output. You should use a thru box and not an audio splitter or such.
So devices like the MIDI Solutions Quadra thru which harvest power from the MIDI bus themselves are not advisable to use with the RK-002. On occasion it seems this box can even leave the RK-002 in an unuseable boot mode.