If you struggle with chord changes on the OP-1 or remembering progressions in between sessions, I found the pattern sequencer can act as nice place to save and perform from.

The idea is to enter the cords into the sadly just 1 bar pattern sequencer with a bit of space between them like in the picture. Then set the envelope to a longer release and when you press the C key short enough you just hear the first chord. After that you can roll through the chords with shift and green encoder and select the next chord without loosing the first. You can record chords way more rhytmically this way and more precise instead of having to change position on the keyboard.

Next time you want to continue you still have the chords in the memory! :D

TLDR:

• Enter Chords one after another
• Adjust envelope to a bit of release
• Play first chord and record
• Roll through chords with shift and green
• Record next chord
• And so on

Maybe obvious but why not share.