A simple (monophonic) 5 oscillator additive synth (the first oscillator is the root – i.e. the input frequency/MIDI note). Has a scope so you can see what kind of waveform you’re creating, although this part wasn’t coded particularly well, so it tends to slow down your GUI updates (although not your audio playback, due to the way the VST standard works). It can be switched off by clicking on it, however.

Download Hard-Boiled Wonderland v1.01 for Windows