There are a number of different ways to convert 3.3v logic to 5v. The first question to ask is whether you even need to convert. This depends on the synthesizer you intend to drive. It is possible that 3.3v logic...
I am glad this project looks useful to you. I used the Teensy 2.0 in this project because I wanted the 5V outputs on the gate and trigger, and the 2.0 is more than enough to get the job done. Of course you could use a...