Hi there @chicksluvus
The last 2 nodes are the ones that will define the Key of the Kick. If you set them equally, your Kick will match the chosen key ( you can check this with a frequency spectrum analyzer like the free Span from Voxengo ).
After tuning your Kick in the right key you can then use the Pitch knob to change octave.
If you set the last node different than the for-last one, it will create some harmonic content after the fundamental and that will be reflected in the area after the transient ( referred as the Kick "boxiness" area ) that can also be used to fine tune the kick to your liking.
Since Kicks & many percussive sounds contains short transient audio, it's hard to use tools like tuners, best practice is to do it by ear and to double check with a FFT analyzer like Span.
