Can I add patterns from a PC/Mac, etc?

Yes.
By using the dedicated software Chordcat Manager, you can forward the standard MIDI files stored in a PC/Mac to this product and perform/edit them as patterns on this product. Please use DAW software, etc. to create standard MIDI files.
You can also forward the patterns created on this product to a PC/Mac as standard MIDI files.

You can download the latest Chordcat Manager from here.
<https://www.ーーー（TBD）>.

NOTE:
The specifications of the Chordcat and MIDI files are not the same, so the Chordcat patterns after the conversion may not be able to completely reproduce the original MIDI files.