This is a wonderful Semi-Modular Synthesizer. I ran across an incredible deal which I could not pass up, { Ever since the Microvolt 3900 came out I've been saving and looking out for any type of sales/deals on it. }. A few weeks ago I was able to purchase this beautifully designed machine. I am enjoying the sounds which can be created by using all the slides , square blue buttons, knobs and just started to use the patch bay which I am learning about through reading, watching RU-vid tutorials, listening to videotaped talks, etc. I love the Microvolt 3900 -it's so full of creative potential as well as exciting, at least for me, to play. Thank you for making such a wondrously creativity-provoking Semi-Modular Synthesizer.