The Opsix looks very straightforward. I bought the Digitone Keys about three years ago and it's a lot of fun, along with having that sequencer and Elektron Inte

The Opsix looks very straightforward. I bought the Digitone Keys about three years ago and it's a lot of fun, along with having that sequencer and Elektron Interface. It does not appear to have been a successful product, and I do not think it's really possible to use a full instrument, but I have enjoyed using it as a plaything to learn and understand FM synthesis. No doubt there is some creative wizard like Blue Lab Beats who probably uses this and a Digitakt to make whole albums.