So the issue of what is connected to what is something I've been thinking about. I may end up having a mode where you can see pins connecting things together, or even a way to modify them visually. But for now, you are essentially correct. Top-Left to bottom right. It's slightly more complicated because from Oscillator1 -> Filter Envelope are effectively all 'parallel', and there's a hidden node which combines them before they go into the low pass filter. The bit of script I show at the end has the full connection details, but you might also think of this as a UI for a SuperCollider SynthDef. In that case, you wouldn't normally see a UI at all.