From Leads to FX, this sound pack by Dawless Jammin' includes 34 carefully designed sounds that push the OP-1's Synth Engines to their limits.
Watch this video by JAde Wii on the AskAudio OP-1 Dawless sound pack:
This Sound Pack is for OP-1 users only, they're special files that won't work on a regular sampler. To install, drag the "Dawless" folder into your OP-1 "Synth" folder. Simple as that!