I compiled the sample packs for op-1 that I had previously released in one sample pack. Previous sample packs were released free of charge, but because it was compiled, it exceeded the capacity limit of gumroad, so it became charged. However, if you enter the code, you can download it for free. The code is "moodyblues".
From now on, when I release samples for op-1, upload samples to this sample pack. If I update this sample pack, I will contact you.