You should be able to set the output levels on your cassette deck.
A freeware program by the name of Audacity could be of use.
I use Cool Edit Pro. It has since been bought by Adobe and renamed Adobe Audition.
I adjust the levels on my cassette deck but view the levels in Cool Edit Pro rather than my cassette deck meters. I have monitor out on my receiver, so I can record from any source, LP, CD, cassette, VHS, DVD, that I have connected to my stereo.