I am building a synth program for producing waveforms such as binaural. The programs I have used in the past have been mediocre.

In that project I am working on a realtime scope to visualize the waveforms. It is fun to learn how to streamline moving data between parts of the application. Right now it has a lot of unnecessary data copying going on, and resizing of vectors. So I am reading some books on high performance C++ to learn how to do this better. As part of this I am thinking about building a circular buffer so the vector is never resized and is always in contiguous memory.

Just plain fun!