There is. Watch this tut on automation: https://www.youtube.com/watch?v=oTzSpVBjQlo&list=PLA269719916DB3C29&index=4&feature=plpp_video All you have to do is ctrl+drag the pitch knob instead of the cutoff frequency knob. Feel free to ask if you have further questions or need clarification.
Or you could watch my LMMS and music hacking tuts:
Season 1: https://www.youtube.com/playlist?list=P ... re=mh_lolz
Season 2: https://www.youtube.com/playlist?list=P ... re=mh_lolz