1. work out key of your song
2. open operator and have it set to pure sine tone.
3. using this chart
http://www.phy.mtu.edu/~suits/notefreqs.html
work out frequency of the key of your song.
4. set the sine wave in operator at a fixed frequency to this (a low octave whichever is nearest around 80 to 100ish is perfect)
5. place a gate on operator channel.
6. have the kick drum of your track trigger the gate on your operator channel.
7. BOOOOOM
it's so beautiful.. give it a try, BIG BIG kick
also works so well if you sidechain bass off the kick..
hope you like and if you've heard before, well you know how good it is!!