He could always import a copy of Akuden Densetsu and do the crunk mod to the VRC7 chip

you need to use the sunsoft dubstep LFO expansion chip

I was away from my computer. eating.

You thought you would get a faster reply here, but I replied 5 minutes after you made the post on FT forums... which you haven't responded to

@delek i've done that but i thought i may get a faster reply here as the forums seem more alive
@jellica i can't change the duty cycles as those are part of the wobble

is it a phasing sound you are getting from playing the same sound on two channels at the same time?
try maybe changing the sound on the 2nd channel, if it is a pulsewave, change the duty cycle or something.,

I suggest you to post this in the FamiTracker forum, it is more active in terms of FT users.

to get a stronger bass, its running in unison on two channels, however it doesn't seem to be in sync, any suggestions as to what could be happening, i've checked to see if it's a rogue command but i don't think it is.
if you want to see the .ftm just give me your email and i'll email it to you