I highly recommend anyone with some electronics assembly knowledge and a love of synths to pick up one of these TSynth kits if you can. I was an early purchaser/builder of the Teensy 3.6 model and it is an amazing little synth! It has some of the depth and power found only in real analog synths. The bass capabilities of this little beast are awesome. Well worth the price and time to build it. The kit comes as some partly assembled PCBs (a few parts already soldered on) but you need to supply about $100 worth of components yourself which includes the Teensy 4.1, the Teensy Audio Shield and about 30 potentiometers and other passive parts. You can try to buy one on Tindie.com but be warned there is a back order list ten miles long and kit supplies are limited and sell fast. There are a few international resellers that may have stock, but you'll have to check ElectroTechnique's web site to get the latest information on available and features.If you can manage to score one for yourself, you won't be disappointed! This is an amazing synth with lots of versatility and open source software so you can make it do what you want.