AlgoRhythmia was my first “complex” desktop app. By complex I mean difficult to build and with a deep interface that could be explored and tinkered with extensively.
It’s a drum machine that can generate random beats. It can also “mutate” existing beats and cause them to change over time.
This is the windows version, but the macOS version looks identical.
It started as a Windows app. It used DirectX, a very Windows-centric audio engine. Because of this, I never tried to build a version for another operating system. Well, now I have. And it is available for OSX.