Modular Synth - Create low frequency sounds

Im implementing a motion platform that supports haptic feedback and Im trying to use the modular synth to generate low frequency sounds that rumbles the platform.
Im trying to get a specifik sound (around 30-33hz) like this:

Im normaly a gameplay guy so working with sounds is something unfamiliar to me.

Can anyone here give some pointers?


This came up on a thread elsewhere and I tweeted about it – check it out.