I too agree that the question does not provide the right detail BUT talking about asymmetrical waveforms, the answer lies in phase rotation, the way kahn (or whatever spelling that name has) the radiowaves pioneer managed to squeeze +6 db headroom from male voices, cause this is very often in male vocal recordings (And class A amplifiers when they are driven hard)!
Another way of fighting this issue to gain some more headroom, is passing your signal through a hardware device with audio transformers!
First thing i would look for is the phase rotation plugin: play with the poles and bandwidth and in the meantime record your signal internally so you can see the results!
keep in mind, phase rotation can be found also as group delay(in audio applications), the term "phase rotator" is oftenly misused in plugin applications and what you get is plugins that just flip the phase or just ... phasers...
Here are some very usefull articles covering wave asymmetry and phase rotation as a counteraction:
At last , you can also look for third party software that does the job, i bet you'll find some in form of plugin or not! :D