good news! there is something you can do. however it will involve some money. sound forge, ufortunately, is not going to help. there are 2 solutions:
1st- send your mix to a professional mastering house with noise reduction capibilities. you will need to leave a little empty space with the noise before the track. this will help them accurately create a "noise profile". what thier equipment basically does is add numerous notch filters to the overall mix.
2nd- do it yourself. you can obtain software plug-ins that do the same thing. however you will have to keep the same noise before the track. i have experimented with different versions and almost all have had disapointing results. the only one i have found that effectivly reduces or cuts the noise completely out is X-Noise by Waves (www.waves.com). its rather expensive but totally worth the money. it has a learn feature and is rather easy to use.
future recording option- invest in a nice tube-pre that has an 80hz rumble feature. this will help cut it out in the begining. the cheapest i have found is PreSonus' Tube-Pre, around $100. cheap and easy and also adds great analog "warmth".
-god, i should work for these guys!-
