RYTM MIDI port config:

OUT PORT FUNCTIONALITY selects what type of signal the MIDI OUT port will send.
• MIDI makes it possible for the port to send out MIDI data.
• DIN 24 will make the port send DIN 24 sync pulses. No MIDI data is sent on the port when this option
is selected.
• DIN 48 will make the port send DIN 48 sync pulses. No MIDI data is sent on the port when this option
is selected.

The DARK TIME uses 24 pulses/quarter note.

Maybe wrong setting?