ok, ive done a degree based on sound (music tech) and i will tell you right now, if you are looking to take a song with a voice singing on it and are trying to remove the voice, it is not possible, the human voice resonates at around 3 Khz, the best you could possible do is to use a multi band compressor and decrease the volume around this frequency, however this will also decrese the volume of anything witch is at the frequency, which in most wrestling type soungs would be the main focus frequency of an electronic guitar! you would destort the original timbre of the other instrumnets at this frequency and would, in short, make it sound crap.
if, for example, you wanted to remove the snare or kick drum, this this is much more possible, at they are sounds which use a set frequecny range and can be reduced in volume without effecting to much else, but a human voice changes pitch and frequency constantly and make it impossible to remove without effecting the rest of the song