im not familar with goldwave....
but....maybe you should check your levels....
if you click on your little icon down there in your
windows task bar...(pc right?)..
anyway..if your soundcard allows it..you can adjust your levels...for your line in/mic..
mine has a separate one for line in and mic..
i use line in for my guitar..and play a little bit
and adjust the slider on the 'record' area..
until i get a nice "hot" level...
where it almost goes up to the red indicators but not really?
i wonder if any of this is making sense..
then once that is set on your soundcard..you can
adjust the recording level in your program..
thats how it works for me anyway..