The OP-1 is a 24 button synth that is powered by batteries and not a USB or wall connection. It has 8 synth engines and 2 sampler engines along with a decent effects selection and 16 hour use time before the batteries go dead. I have only had this for about 4 months now and one of the things that I was worried about the most was going to be if I really was going to use it, because it was not as cheap as I thought it should have been.
The OP-1 is simple to use once you get the hang of it. I love that I can use it anywhere because it is pretty small and portable and runs off of batteries. I have used this synth for hours on end because I never really get tired of using it. But it is more fun than anything and I think that is why I am upset that I purchased it.
The OP-1 does have up to 6 minutes of recording time and it can even be expanded up to 24 minutes of recording time but that will cost more money and with the price of this synth already costing 900 dollars it was a little unfair when I heard that I had to pay for the upgrade for something that should have already been included anyways. The effects surprised me, they are actually pretty good!
All of the functions on the OP-1 are color coded which I thought was pretty cool. The synth engines are very good though, I will admit that! I was able to create many unique and different sounding synths pretty easily. But like I said with this unit it is more fun than anything and I do enjoy playing with it but really I didn’t “need” it. It was more along the lines of I “want” it because it seems fun. I still use it a lot though and have fun with it, but I just don’t think it is crucial for me to have the OP-1.